NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

375 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/30/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, last 30 days
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2019-05-21 346-465 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H LANGHAMCRK TX
2019-05-21 346-529 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H HSTNSUBURB TX
2019-05-21 346-732 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H CYPRESS TX
2019-05-21 346-758 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H RICHMNRNBG TX
2019-05-21 346-766 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H HOUSTON TX
2019-05-21 346-842 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H HUMBLE TX
2019-05-21 346-877 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H DEER PARK TX
2019-05-21 346-988 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H CLEVELAND TX
2019-05-21 424-431 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E BEVERLYHLS CA
2019-05-21 430-666 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H DENISON TX
2019-05-21 504-877 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H NEWORLEANS LA
2019-05-21 504-977 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H VENICE LA
2019-05-21 581-864 not yet reported which blocks → Videotron Ltd. 8306 Saint-Gedeon-de-Beauce —
2019-05-21 646-970 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN01 NY
2019-05-21 647-431 not yet reported which blocks → Bell Mobility 6574 Toronto —
2019-05-21 647-433 not yet reported which blocks → Bell Mobility 6574 Toronto —
2019-05-21 647-434 not yet reported which blocks → Bell Mobility 6574 Toronto —
2019-05-21 657-382 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2019-05-21 657-402 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WESTMINSTR CA
2019-05-21 737-356 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H GEORGETOWN TX
2019-05-21 737-373 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H SAN MARCOS TX
2019-05-21 737-465 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H AUSTIN TX
2019-05-21 737-758 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H KEMPNER TX
2019-05-21 737-766 0–9 XXXall 10 · 8 holders which blocks → FRACTEL, LLC 965H LEANDER TX
2019-05-21 775-567 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H RENO NV
2019-05-21 848-272 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NJ 118F ATLATCHLDS NJ
2019-05-21 914-386 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H MOUNTKISCO NY
2019-05-21 914-639 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H WSCHSTZN01 NY
2019-05-21 914-786 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H WSCHSTZN02 NY
2019-05-21 929-616 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H NWYRCYZN09 NY
2019-05-21 929-667 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H NWYRCYZN10 NY
2019-05-21 929-758 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H NWYRCYZN13 NY
2019-05-21 929-816 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H NWYRCYZN12 NY
2019-05-21 929-842 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H NWYRCYZN07 NY
2019-05-21 954-807 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 FTLAUDERDL FL
2019-05-21 985-336 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → FRACTEL, LLC 965H DULAC LA
2019-05-20 206-591 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 BAINBDG IS WA
2019-05-20 213-766 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H LSAN DA 07 CA
2019-05-20 240-677 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSHNGTNZN5 MD
2019-05-20 337-877 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H VINTON LA
2019-05-20 412-643 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - PA 547E PTTSBGZON1 PA
2019-05-20 424-758 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H CMTN CMTN CA
2019-05-20 504-677 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H KENNER LA
2019-05-20 504-732 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H JESUITBEND LA
2019-05-20 504-788 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H LAFITTE LA
2019-05-20 619-860 0–9 XXXall 10 · 6 holders which blocks → ONVOY SPECTRUM, LLC 624H SNDG SNDG CA
2019-05-20 628-465 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H SAUSALITO CA
2019-05-20 628-529 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H SNFC JUNPR CA
2019-05-20 650-677 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H SSNFRNCSCO CA
2019-05-20 720-647 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CO 026D DENVER CO

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.