Pre NNP 1 Pre NNP A call is originated Originating Switching IXC Queries Slides 14-22 Network Database for Determines Is the Calling Number s LRN Dialed No presubscribed Number IXC Local Originating Slides 17-22 Switching Yes Network Based upon query Queries Yes Response Slides 7-13 Database for IXC Switch (CdPN/LRN,) Call is Local LRN determines routed to Inter Switch if Dialed Switch trunk toward determines NPA NXX is terminating network Yes if Dialed portable NPA NXX is portable Based upon query Response (CdPN/LRN,) Call is No Slides 3-6 routed to Inter No Switch trunk toward terminating network Call is routed to the Slides 14-16 appropriate terminating Call is routed to the end office or network for appropriate terminating termination to end office or network for subscriber s Line termination to subscriber s Line 2 Pre NNP PSTN Class 5  Non-portable NXX Intra Switch Local Call Routed to Subscriber Class 5 Switch A B C D E 3 Pre NNP PSTN Class 5 to Class 5  Non-Portable NXX Inter Switch Local Call Routed to Subscriber Class 5 Switch A B C D ISUP Trunk E F 4 Pre NNP PSTN Class 5 to Class 4 to Class 5  Non-Portable NXX Inter Switch Local Call Routed Direct to Subscriber Class 5 Class 4 Switch Switch A B C D ISUP Trunk E F 5 Pre NNP PSTN Class 5 to Class 4 to Class 5  Non-Portable NXX Inter Switch Local Call Routed Direct to Subscriber Class 5 Class 4 Class 4 Switch Switch Switch A B C D E ISUP Trunk F 6 Pre NNP PSTN Class 5  Portable NXX Non-Ported Number Intra Switch Local Call Routed to Subscriber Class 5 LNP Switch Database A B C LNP Query D CdPN E F G 7 Pre NNP PSTN Class 5 to Class 5  Portable NXX Non-Ported Number Intrer Switch Local Call Routed to Subscriber Class 5 LNP Switch Database A B C LNP Query D CdPN E F ISUP Trunk G H 8 Pre NNP PSTN Class 5 to Class 4 to Class 5  Portable NXX Non-Ported Number Inter Switch Local Call Routed to Subscriber Class 5 LNP Class 4 Switch Database Switch A B C LNP Query D CdPN E F ISUP Trunk G H 9 Pre NNP PSTN Class 5 to Class 4 to Class 4 to Class 5  Portable NXX Non-Ported Number Inter Switch Local Call Routed to Subscriber Class 5 LNP Class 4 Class 4 Switch Database Switch Switch A B C LNP Query D CdPN E F ISUP Trunk G H 10 Pre NNP PSTN Class 5 to Class 5  Portable NXX Ported Number Inter Switch Local Call Routed to Subscriber Class 5 LNP Switch Database A B C LNP Query D LRN E F ISUP Trunk G CdPN = LRN, GAP = DN, M-bit = 1 H 11 Pre NNP PSTN Class 5 to Class 4 to Class 5  Portable NXX Ported Number Inter Switch Local Call Routed to Subscriber Class 5 LNP Class 4 Switch Database Switch A B C LNP Query D LRN E F ISUP Trunk G H 12 Pre NNP PSTN Class 5 to Class 4 to Class 4 to Class 5  Portable NXX Ported Number Inter Switch Local Call Routed to Subscriber Class 5 LNP Class 4 Class 4 Switch Database Switch Switch A B C LNP Query D LRN E F ISUP Trunk G H 13 Pre NNP PSTN Class 5 to IXC to Class 5  Portable NXX Non-Ported Number Inter Switch Long Distance Call Routed to Subscriber Class 5 IXC LNP Switch Database A B C D LNP Query E CdPN F ISUP Trunk G H 14 Pre NNP PSTN Class 5 to Class 4 to IXC to Class 5  Portable NXX Non-Ported Number Inter Switch Long Distance Call Routed to Subscriber Class 5 Class 4 IXC LNP Switch Database Switch A B C D LNP Query E CdPN F ISUP Trunk G H 15 Pre NNP PSTN Class 5 to Class 4 to IXC to Class 4 to Class 5  Portable NXX Non-Ported Number Inter Switch Long Distance Call Routed to Subscriber Class 5 Class 4 IXC LNP Class 4 Switch Database Switch Switch A B C D LNP Query E CdPN F ISUP Trunk G H 16 Pre NNP PSTN Class 5 to IXC to Class 5  Portable NXX Ported Number Inter Switch Long Distance Call Routed to Subscriber Class 5 IXC LNP Switch Database A B C D LNP Query E LRN F ISUP Trunk G H 17 Pre NNP PSTN Class 5 to Class 4 to IXC to Class 5  Portable NXX Ported Number Inter Switch Long Distance Call Routed to Subscriber Class 5 Class 4 IXC LNP Switch Database Switch A B C D LNP Query E LRN F ISUP Trunk G H 18 Pre NNP PSTN Class 5 to Class 4 to IXC to Class 4 to Class 5  Portable NXX Ported Number Inter Switch Long Distance Call Routed to Subscriber Class 5 Class 4 IXC LNP Class 4 Switch Database Switch Switch A B C D LNP Query E LRN F ISUP Trunk G H 19 NLRN Option 1 20 NNP NLRN Option 1 A call is Query by IXC Based on LRN, originated Call is routed to Switch Inter Switch Determines trunk toward Slides 31-44 Calling terminating Number s network presubscribed IXC Yes Switch determines Is the if Dialed Dialed Slides 39-44 Yes NPA NXX is Number portable Local Yes Yes Is the IXC Queries Dialed Call is No Number Database for No LRN rejected by Local Calling Number s Call is IXC rejected by Calling No Slides 32-38 Slides 42-44 Slides 25-31 Number s Slides 38-41 IXC Slides 36-38 No Call is routed to the Call is routed to the Call is routed to the Is the appropriate terminating Slides 32-35 appropriate terminating appropriate terminating Dialed end office or network for end office or network for end office or network for Number termination to termination to termination to Ported subscriber s Line subscriber s Line subscriber s Line 21 NNP NLRN Option 1 Query by IXC PSTN Class 5  Non-portable NXX Intra Switch Local Call Routed to Subscriber Class 5 Switch A B C D E 22 NNP NLRN Option 1 Query by IXC PSTN Class 5 to Class 5  Non-Portable NXX Inter Switch Local Call Routed to Subscriber Class 5 Switch A B C D E ISUP Trunk F 23 NNP NLRN Option 1 Query by IXC PSTN Class 5 to Class 4 to Class 5  Non-Portable NXX Inter Switch Local Call Routed Direct to Subscriber Class 5 Class 4 Switch Switch A B C D ISUP Trunk E F 24 NNP NLRN Option 1 Query by IXC PSTN Class 5 to Class 4 to Class 5  Non-Portable NXX Inter Switch Local Call Routed Direct to Subscriber Class 5 Class 4 Class 4 Switch Switch Switch A B C D E ISUP Trunk F 25 NNP NLRN Option 1 Query by IXC PSTN Class 5 to Class 4 to IXC to Class 4 to Class 5  Non-Portable NXX Inter Switch Long Distance Call Routed to Subscriber Class 5 IXC Switch A B C D ISUP Trunk E F 26 NNP NLRN Option 1 Query by IXC PSTN Class 5 to Class 4 to IXC to Class 5  Non-Portable NXX Inter Switch Long Distance Call Routed to Subscriber Class 5 Class 4 IXC Switch Switch A B C D ISUP Trunk E F 27 NNP NLRN Option 1 Query by IXC PSTN Class 5 to Class 4 to IXC to Class 4 to Class 5  Non-Portable NXX Inter Switch Long Distance Call Routed to Subscriber Class 5 Class 4 IXC Class 4 Switch Switch Switch A B C D ISUP Trunk E F 28 NNP NLRN Option 1 Query by IXC PSTN Class 5  Portable NXX Non-Ported Number Intra Switch Local Call Routed to Subscriber Class 5 IXC LNP Switch Database A B C LNP Query D CdPN E F G H 29 NNP NLRN Option 1 Query by IXC PSTN Class 5 to Class 5  Portable NXX Non-Ported Number Intrer Switch Local Call Routed to Subscriber Class 5 IXC LNP Switch Database A B C LNP Query D CdPN E F ISUP Trunk G H 30 NNP NLRN Option 1 Query by IXC PSTN Class 5 to Class 4 to Class 5  Portable NXX Non-Ported Number Inter Switch Local Call Routed to Subscriber Class 5 Class 4 IXC LNP Switch Database Switch A B C LNP Query D CdPN E F ISUP Trunk G H 31 NNP NLRN Option 1 Query by IXC PSTN Class 5 to Class 4 to Class 4 to Class 5  Portable NXX Non-Ported Number Inter Switch Local Call Routed to Subscriber Class 5 Class 4 IXC LNP Class 4 Switch Database Switch Switch A B C LNP Query D CdPN E F ISUP Trunk G H 32 NNP NLRN Option 1 Query by IXC PSTN Class 5 to IXC to Class 5  Portable NXX Non-Ported Number Inter Switch Long Distance Call Routed to Subscriber Class 5 IXC LNP Switch Database A B C LNP Query D CdPN E F ISUP Trunk G 33 NNP NLRN Option 1 Query by IXC PSTN Class 5 to Class 4 to IXC to Class 5  Portable NXX Non-Ported Number Inter Switch Long Distance Call Routed to Subscriber . Class 5 Class 4 IXC LNP Switch Database Switch A B C D LNP Query E CdPN F ISUP Trunk G 34 NNP NLRN Option 1 Query by IXC PSTN Class 5 to Class 4 to IXC to Class 4 to Class 5  Portable NXX Non-Ported Number Inter Switch Long Distance Call Routed to Subscriber Class 5 Class 4 IXC LNP Class 4 Switch Database Switch Switch A B C D LNP Query E CdPN F ISUP Trunk G 35 NNP NLRN Option 1 Query by IXC PSTN Class 5 to Class 5  Portable NXX Ported Number Inter Switch Local Call Routed to Subscriber Class 5 IXC LNP Switch Database A B C LNP Query D LRN E F ISUP Trunk G H 36 NNP NLRN Option 1 Query by IXC PSTN Class 5 to Class 4 to Class 5  Portable NXX Ported Number Inter Switch Local Call Routed to Subscriber Class 5 Class 4 IXC LNP Switch Database Switch A B C LNP Query D LRN E F ISUP Trunk G H 37 NNP NLRN Option 1 Query by IXC PSTN Class 5 to Class 4 to Class 4 to Class 5  Portable NXX Ported Number Inter Switch Local Call Routed to Subscriber Class 5 Class 4 IXC LNP Class 4 Switch Database Switch Switch A B C LNP Query D LRN E F ISUP Trunk G H 38 NNP NLRN Option 1 Query by IXC PSTN Class 5 to IXC to Class 5  Portable NXX Ported Number Inter Switch Long Distance Call Routed to Subscriber Class 5 IXC LNP Switch Database A B C LNP Query D LRN E ISUP Trunk F G 39 NNP NLRN Option 1 Query by IXC PSTN Class 5 to Class 4 to IXC to Class 5  Portable NXX Ported Number Inter Switch Long Distance Call Routed to Subscriber Class 5 Class 4 IXC LNP Switch Database Switch A B C LNP Query D LRN E ISUP Trunk F G 40 NNP NLRN Option 1 Query by IXC PSTN Class 5 to Class 4 to IXC to Class 4 to Class 5  Portable NXX Ported Number Inter Switch Long Distance Call Routed to Subscriber Class 5 Class 4 IXC LNP Class 4 Switch Database Switch Switch A B C LNP Query D LRN E ISUP Trunk F G 41 NLRN Option 2 42 NNP NLRN Option 2 A call is Portable = LD originated Switch Determines Slides 54-66 Calling Number s presubscribed Yes IXC Switch determines if Dialed NPA NXX is portable IXC Queries Based on CDPN, Database for Based on LRN, Call is routed to LRN Call is routed to Inter Switch Inter Switch trunk toward trunk toward terminating No terminating network network Slides 54-60 Slides 61-66 Slides 47-53 No Yes Call is routed to the Call is routed to the Is the Call is routed to the appropriate terminating appropriate terminating Dialed appropriate terminating end office or network for end office or network for Number end office or network for termination to termination to Ported termination to subscriber s Line subscriber s Line subscriber s Line 43 NNP NLRN Option 2 Portable = LD2 PSTN Class 5  Non-portable NXX Intra Switch Local Call Routed to Subscriber Class 5 Switch A B C D E 44 NNP NLRN Option 2 Portable = LD Portable = LDPSTN Class 5 to Class 5  Non-Portable NXX Inter Switch Local Call Routed to Subscriber Class 5 Switch A B C D E ISUP Trunk F 45 NNP NLRN Option 2 Portable = LD PSTN Class 5 to Class 4 to Class 5  Non-Portable NXX Inter Switch Local Call Routed Direct to Subscriber Class 5 Class 4 Switch Switch A B C D ISUP Trunk E F 46 NNP NLRN Option 2 Portable = LD PSTN Class 5 to Class 4 to Class 5  Non-Portable NXX Inter Switch Local Call Routed Direct to Subscriber Class 5 Class 4 Class 4 Switch Switch Switch A B C D E ISUP Trunk F 47 NNP NLRN Option 2 Portable = LD PSTN Class 5 to Class 4 to IXC to Class 4 to Class 5  Non-Portable NXX Inter Switch Long Distance Call Routed to Subscriber Class 5 IXC Switch A B C D ISUP Trunk E F 48 NNP NLRN Option 2 Portable = LD PSTN Class 5 to Class 4 to IXC to Class 5  Non-Portable NXX Inter Switch Long Distance Call Routed to Subscriber Class 5 Class 4 IXC Switch Switch A B C D ISUP Trunk E F 49 NNP NLRN Option 2 Portable = LD PSTN Class 5 to Class 4 to IXC to Class 4 to Class 5  Non-Portable NXX Inter Switch Long Distance Call Routed to Subscriber Class 5 Class 4 IXC Class 4 Switch Switch Switch A B C D ISUP Trunk E F 50 NNP NLRN Option 2 Portable = LD PSTN Class 5  Portable NXX Non-Ported Number Intra Switch Local Call Routed to Subscriber Class 5 IXC LNP Switch Database A B C LNP Query D CdPN E F G 51 NNP NLRN Option 2 Portable = LD PSTN Class 5 to Class 5  Portable NXX Non-Ported Number Intrer Switch Local Call Routed to Subscriber Class 5 IXC LNP Switch Database A B C LNP Query D CdPN E ISUP Trunk F G 52 NNP NLRN Option 2 Portable = LD PSTN Class 5 to Class 4 to Class 5  Portable NXX Non-Ported Number Inter Switch Local Call Routed to Subscriber Class 5 Class 4 IXC LNP Switch Database Switch A B C LNP Query D CdPN E ISUP Trunk F G 53 NNP NLRN Option 2 Portable = LD PSTN Class 5 to Class 4 to Class 4 to Class 5  Portable NXX Non-Ported Number Inter Switch Local Call Routed to Subscriber Class 5 Class 4 IXC LNP Class 4 Switch Database Switch Switch A B C LNP Query D CdPN E ISUP Trunk F G 54 NNP NLRN Option 2 Portable = LD PSTN Class 5 to IXC to Class 5  Portable NXX Non-Ported Number Inter Switch Long Distance Call Routed to Subscriber Class 5 IXC LNP Switch Database A B C LNP Query D CdPN E F ISUP Trunk G 55 NNP NLRN Option 2 Portable = LD PSTN Class 5 to Class 4 to IXC to Class 5  Portable NXX Non-Ported Number Inter Switch Long Distance Call Routed to Subscriber . Class 5 Class 4 IXC LNP Switch Database Switch A B C D LNP Query E CdPN F ISUP Trunk G 56 NNP NLRN Option 2 Portable = LD PSTN Class 5 to Class 4 to IXC to Class 4 to Class 5  Portable NXX Non-Ported Number Inter Switch Long Distance Call Routed to Subscriber Class 5 Class 4 IXC LNP Class 4 Switch Database Switch Switch A B C D LNP Query E CdPN F ISUP Trunk G 57 NNP NLRN Option 2 Portable = LD PSTN Class 5 to Class 5  Portable NXX Ported Number Inter Switch Local Call Routed to Subscriber Class 5 IXC LNP Switch Database A B C LNP Query D LRN E ISUP Trunk F G 58 NNP NLRN Option 2 Portable = LD PSTN Class 5 to Class 4 to Class 5  Portable NXX Ported Number Inter Switch Local Call Routed to Subscriber Class 5 Class 4 IXC LNP Switch Database Switch A B C LNP Query D LRN E ISUP Trunk F G 59 NNP NLRN Option 2 Portable = LD PSTN Class 5 to Class 4 to Class 4 to Class 5  Portable NXX Ported Number Inter Switch Local Call Routed to Subscriber Class 5 Class 4 IXC LNP Class 4 Switch Database Switch Switch A B C LNP Query D LRN E ISUP Trunk F G 60 NNP NLRN Option 2 Portable = LD PSTN Class 5 to IXC to Class 5  Portable NXX Ported Number Inter Switch Long Distance Call Routed to Subscriber Class 5 IXC LNP Switch Database A B C LNP Query D LRN E ISUP Trunk F G 61 NNP NLRN Option 2 Portable = LD PSTN Class 5 to Class 4 to IXC to Class 5  Portable NXX Ported Number Inter Switch Long Distance Call Routed to Subscriber Class 5 Class 4 IXC LNP Switch Database Switch A B C LNP Query D LRN E ISUP Trunk F G 62 NNP NLRN Option 2 Portable = LD PSTN Class 5 to Class 4 to IXC to Class 4 to Class 5  Portable NXX Ported Number Inter Switch Long Distance Call Routed to Subscriber Class 5 Class 4 IXC LNP Class 4 Switch Database Switch Switch A B C LNP Query D LRN E ISUP Trunk F G 63 NLRN Option 3 64 NNP NLRN Option 3 A call is Query by Originating Switch originated Originating Slide 83-85 Switching Network Queries Slides 73-88 Originating Database for No Switching Network LRN Is the Is the Slides 80-88 Slides 80-85 Determines LRN Dialed Yes Yes Calling Number s Switch Within Number Presubscribed IXC determines the LATA Local if Dialed Yes NPA NXX is Is the portable Dialed Number No Ported Originating Yes Based on LRN, Switching Slide 86-88 Call is routed to Network Inter Switch Determines No trunk toward Calling Number s terminating Presubscribed Slides 73-79 network No IXC Slides 66-72 Is the Slide 80-82 Dialed Slides 77-79 No Number Call is routed to the appropriate terminating Call is routed to the Local Call is routed to the end office or network for appropriate terminating Slides 73-76 appropriate terminating termination to end office or network for end office or network for subscriber s Line termination to termination to subscriber s Line Yes subscriber s Line 65 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5  Non-portable NXX Intra Switch Local Call Routed to Subscriber Class 5 Switch A B C D E 66 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to Class 5  Non-Portable NXX Inter Switch Local Call Routed to Subscriber Class 5 Switch A B C D E ISUP Trunk F 67 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to Class 4 to Class 5  Non-Portable NXX Inter Switch Local Call Routed Direct to Subscriber Class 5 Class 4 Switch Switch A B C D ISUP Trunk E F 68 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to Class 4 to Class 5  Non-Portable NXX Inter Switch Local Call Routed Direct to Subscriber Class 5 Class 4 Class 4 Switch Switch Switch A B C D E ISUP Trunk F 69 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to Class 4 to IXC to Class 4 to Class 5  Non-Portable NXX Inter Switch Long Distance Call Routed to Subscriber Class 5 IXC Switch A B C D ISUP Trunk E F 70 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to Class 4 to IXC to Class 5  Non-Portable NXX Inter Switch Long Distance Call Routed to Subscriber Class 5 Class 4 IXC Switch Switch A B C D ISUP Trunk E F 71 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to Class 4 to IXC to Class 4 to Class 5  Non-Portable NXX Inter Switch Long Distance Call Routed to Subscriber Class 5 Class 4 IXC Class 4 Switch Switch Switch A B C D ISUP Trunk E F 72 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5  Portable NXX Non-Ported Number Intra Switch NNP Local Call Routed to Subscriber Class 5 LNP Switch Database A B LNP Query C D CdPN E F G 73 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to Class 5  Portable NXX Non-Ported Number Inter Switch NNP Local Call Routed to Subscriber Class 5 LNP Switch Database A B LNP Query C CdPN D E F ISUP Trunk G H 74 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to Class 4 to Class 5  Portable NXX Non-Ported Number Inter Switch Local Call Routed to Subscriber Class 5 LNP Class 4 Switch Database Switch A B C LNP Query CdPN D E F ISUP Trunk G H 75 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to Class 4 to Class 4 to Class 5  Portable NXX Non-Ported Number Inter Switch Local Call Routed to Subscriber Class 5 LNP Class 4 Class 4 Switch Database Switch Switch A B LNP Query C CdPN D E F ISUP Trunk G H 76 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to IXC to Class 5  Portable NXX Non-Ported Number Inter Switch NNP Long Distance Call Routed to Subscriber Class 5 LNP IXC Switch Database A B LNP Query C CdPN D E F ISUP Trunk G H 77 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to Class 4 to IXC to Class 5  Portable NXX Non-Ported Number Inter Switch NNP Long Distance Call Routed to Subscriber Class 5 LNP Class 4 IXC Switch Database Switch A B LNP Query C CdPN D E F ISUP Trunk G H 78 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to Class 4 to IXC to Class 4 to Class 5  Portable NXX Non-Ported Number Inter Switch NNP Long Distance Call Routed to Subscriber Class 5 LNP Class 4 IXC Class 4 Switch Database Switch Switch A B LNP Query C CdPN D E F ISUP Trunk G H 79 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to Class 5  Portable NXX Ported Number Inter Switch NNP Local Call Routed to Subscriber Class 5 LNP Switch Database A B LNP Query C LRN D E F G ISUP Trunk H I 80 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to Class 4 to Class 5  Portable NXX Ported Number Inter Switch Local Call Routed to Subscriber Class 5 LNP Class 4 Switch Database Switch A B C LNP Query LRN D E F G ISUP Trunk H I 81 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to Class 4 to Class 4 to Class 5  Portable NXX Ported Number Inter Switch Local Call Routed to Subscriber Class 5 LNP Class 4 Class 4 Switch Database Switch Switch A B LNP Query C LRN D E F G ISUP Trunk H I 82 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to IXC to Class 5  Portable NXX Ported Number Inter Switch NNP Long Distance Call Routed to Subscriber Class 5 LNP IXC Switch Database A B LNP Query C LRN D E F G ISUP Trunk H I 83 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to Class 4 to IXC to Class 5  Portable NXX Ported Number Inter Switch NNP Long Distance Call Routed to Subscriber Class 5 LNP Class 4 IXC Switch Database Switch A B LNP Query C LRN D E F G ISUP Trunk H I 84 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to Class 4 to IXC to Class 4 to Class 5  Portable NXX Ported Number Inter Switch NNP Long Distance Call Routed to Subscriber Class 5 LNP Class 4 IXC Class 4 Switch Database Switch Switch A B LNP Query C LRN D E F G ISUP Trunk H I 85 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to IXC to Class 5  Portable NXX Ported Number Inter Switch NNP Long Distance Call Routed to Subscriber Class 5 LNP IXC Switch Database A B LNP Query C LRN D E F ISUP Trunk G H 86 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to Class 4 to IXC to Class 5  Portable NXX Ported Number Inter Switch NNP Long Distance Call Routed to Subscriber Class 5 LNP Class 4 IXC Switch Database Switch A B LNP Query C LRN D E F ISUP Trunk G H 87 NNP NLRN Option 3 Query by Originating Switch PSTN Class 5 to Class 4 to IXC to Class 4 to Class 5  Portable NXX Ported Number Inter Switch NNP Long Distance Call Routed to Subscriber Class 5 LNP Class 4 IXC Class 4 Switch Database Switch Switch A B LNP Query C LRN D E F ISUP Trunk G H 88 SIP Call Flows VoIP Non-NNP Ported Number INVITE SIP URL: B@Route1, SBC Route 2& SBC INVITE E.164 LRN LRN ROUTES E.164: B UAS (B2BUA) LNP DB RS INVITE E.164: B Green: Call Orange: Lookup Data Blue: Source Service Provider UAC LSMS NPAC Red: Destination Service Provider Yellow: Third Party VoIP NNP Ported Number INVITE SIP URL: B@IP ADD 192.76.120.192 SBC IP ADD SBC 192.76.120.192 INVITE DOMAIN E.164 SIP URL IP ADD E.164: B B UAS (B2BUA) LNP DB RS INVITE E.164: B Green: Call Orange: Lookup Data Blue: Source Service Provider UAC LSMS NPAC Red: Destination Service Provider Yellow: Third Party VoIP Non-Ported Number INVITE SIP URL: B@Route1, SBC Route 2& SBC INVITE NO E.164 E.164 ROUTES E.164: B RESULT UAS (B2BUA) LNP DB RS INVITE E.164: B Green: Call Orange: Lookup Data Blue: Source Service Provider UAC LSMS NPAC Red: Destination Service Provider Yellow: Third Party Wireless Call Flows Wireless Non-NNP Ported Number INVITE SIP URL: B@Route1, Route 2& S-CSCF IP ADD I-CSCF INVITE E.164 LRN LRN ROUTES E.164: B P-CSCF LNP DB RS INVITE E.164: B Green: Call Orange: Lookup Data Blue: Source Service Provider UE (A) LSMS NPAC Red: Destination Service Provider Yellow: Third Party Wireless NNP Ported Number INVITE SIP URL: B@IP ADD S-CSCF IP ADD I-CSCF INVITE DOMAIN E.164 SIP URL IP ADD E.164: B B P-CSCF ENUM DNS INVITE E.164: B UE (A) LSMS NPAC Wireless Non-Ported Number INVITE SIP URL: B@Route1, Route 2& S-CSCF IP ADD I-CSCF INVITE NO E.164 E.164 ROUTES E.164: B RESULT P-CSCF LNP DB RS INVITE E.164: B Green: Call Orange: Lookup Data Blue: Source Service Provider UE (A) LSMS NPAC Red: Destination Service Provider Yellow: Third Party