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| npa-nxx | State/Province | Company | FRN | RMD | OCN | Rate Center | CLLI | Assign Date | Misc |
| 956-523 | TX | SOUTHWESTERN BELL | N/A | 9533 | LAREDO | LARDTXLADS0 | 03/01/2001 | Prefix Type: RBOC Switch Name: LAREDO Switch Type: WECO 5ESS (Digital) LATA: San Antonio TX (566) Tandem: SNANTXCA03T 🔧 Explore Switch(CLLI: LARDTXLADS0)) | |
| 956-523 is split into 1,000-number blocks - detail below | |||||||||
| 956-523-0XXX | TX | SOUTHWESTERN BELL | N/A | 9533 | LAREDO | LARDTXLADS0 | N/A | Prefix Type: RBOC Switch Name: LAREDO Switch Type: WECO 5ESS (Digital) LATA: San Antonio TX (566) Tandem: SNANTXCA03T 🔧 Explore Switch(CLLI: LARDTXLADS0)) | |
| 956-523-1XXX | TX | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX (Verizon Wireless) | 0005068713 | RMD0003416 | 6506 | LAREDO | SCHZTXCECM2 | 06/06/2019 | Prefix Type: WIRELESS Switch Name: N/A Switch Type: N/A LATA: San Antonio TX (566) Tandem: N/A 🔧 Explore Switch(CLLI: SCHZTXCECM2)) |
| 956-523-2XXX | TX | SOUTHWESTERN BELL | N/A | 9533 | LAREDO | LARDTXLADS0 | N/A | Prefix Type: RBOC Switch Name: LAREDO Switch Type: WECO 5ESS (Digital) LATA: San Antonio TX (566) Tandem: SNANTXCA03T 🔧 Explore Switch(CLLI: LARDTXLADS0)) | |
| 956-523-3XXX | TX | SOUTHWESTERN BELL | N/A | 9533 | LAREDO | LARDTXLADS0 | N/A | Prefix Type: RBOC Switch Name: LAREDO Switch Type: WECO 5ESS (Digital) LATA: San Antonio TX (566) Tandem: SNANTXCA03T 🔧 Explore Switch(CLLI: LARDTXLADS0)) | |
| 956-523-4XXX | TX | SOUTHWESTERN BELL | N/A | 9533 | LAREDO | LARDTXLADS0 | N/A | Prefix Type: RBOC Switch Name: LAREDO Switch Type: WECO 5ESS (Digital) LATA: San Antonio TX (566) Tandem: SNANTXCA03T 🔧 Explore Switch(CLLI: LARDTXLADS0)) | |
| 956-523-5XXX | TX | SOUTHWESTERN BELL | N/A | 9533 | LAREDO | LARDTXLADS0 | N/A | Prefix Type: RBOC Switch Name: LAREDO Switch Type: WECO 5ESS (Digital) LATA: San Antonio TX (566) Tandem: SNANTXCA03T 🔧 Explore Switch(CLLI: LARDTXLADS0)) | |
| 956-523-6XXX | TX | SOUTHWESTERN BELL | N/A | 9533 | LAREDO | LARDTXLADS0 | N/A | Prefix Type: RBOC Switch Name: LAREDO Switch Type: WECO 5ESS (Digital) LATA: San Antonio TX (566) Tandem: SNANTXCA03T 🔧 Explore Switch(CLLI: LARDTXLADS0)) | |
| 956-523-7XXX | TX | SOUTHWESTERN BELL | N/A | 9533 | LAREDO | LARDTXLADS0 | N/A | Prefix Type: RBOC Switch Name: LAREDO Switch Type: WECO 5ESS (Digital) LATA: San Antonio TX (566) Tandem: SNANTXCA03T 🔧 Explore Switch(CLLI: LARDTXLADS0)) | |
| 956-523-8XXX | TX | SOUTHWESTERN BELL | N/A | 9533 | LAREDO | LARDTXLADS0 | N/A | Prefix Type: RBOC Switch Name: LAREDO Switch Type: WECO 5ESS (Digital) LATA: San Antonio TX (566) Tandem: SNANTXCA03T 🔧 Explore Switch(CLLI: LARDTXLADS0)) | |
| 956-523-9XXX | TX | STPCS JOINT VENTURE, LLC | N/A | 4290 | LAREDO | SNANTX91X8X | 09/15/2006 | Prefix Type: PCS Switch Name: N/A Switch Type: N/A LATA: San Antonio TX (566) Tandem: N/A 🔧 Explore Switch(CLLI: SNANTX91X8X)) |