NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

1 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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 — NPA 737
8X8, INC. 1
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
2021-01-12 737-786 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H ELGIN TX
2021-01-11 737-285 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2021-01-08 737-283 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C LOMETA TX
2021-01-08 737-284 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C WIMBERLEY TX
2021-01-07 737-282 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C DALE/LTNSP TX
2020-12-28 737-307 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C BERTRAM TX
2020-12-28 737-317 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C DRIPPNGSPG TX
2020-12-28 737-327 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C HUTTO TX
2020-12-28 737-427 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - TX 903C MCDADE TX
2020-12-28 737-473 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - TX 903C SANGABRIEL TX
2020-12-28 737-677 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - TX 903C SMITHVILLE TX
2020-12-28 737-937 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C MARTINDALE TX
2020-12-08 737-910 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TX 903C AUSTIN TX
2020-11-27 737-899 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H BASTROP TX
2020-11-27 737-977 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H AUSTIN TX
2020-11-25 737-338 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C ELGIN TX
2020-11-16 737-366 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - TX 903C MILANO TX
2020-10-28 737-332 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C BURNET TX
2020-10-28 737-344 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C SAN MARCOS TX
2020-09-28 737-280 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2020-09-28 737-281 0–9 XXXall 10 · 5 holders which blocks → IP HORIZON LLC 515J AUSTIN TX
2020-09-24 737-279 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2020-09-23 737-278 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 BASTROP TX
2020-09-16 737-276 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KYLE TX
2020-09-08 737-275 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F GEORGETOWN TX
2020-09-03 737-842 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H PAIGE TX
2020-09-03 737-877 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H BUDA TX
2020-09-03 737-946 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H ADAMSVILLE TX
2020-08-27 737-274 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 BASTROP TX
2020-08-18 737-336 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H AUSTIN TX
2020-08-12 737-277 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C AUSTIN TX
2020-08-06 737-272 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2020-08-05 737-895 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 3 holders which blocks → TWILIO INTERNATIONAL, INC. 506J AUSTIN TX
2020-07-09 737-477 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H LOCKHART TX
2020-07-09 737-577 0XXX1XXX2XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → FRACTEL, LLC 965H BRIGGS TX
2020-07-09 737-733 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H BASTROP TX
2020-07-02 737-345 0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → FRACTEL, LLC 965H GRANGER TX
2020-07-02 737-732 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H ROCKDALE TX
2020-06-26 737-270 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 478J AUSTIN TX
2020-06-18 737-269 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2020-06-18 737-377 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H AUSTIN TX
2020-06-18 737-667 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H GEORGETOWN TX
2020-06-10 737-268 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2020-05-08 737-825 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J AUSTIN TX
2020-02-28 737-787 0–9 XXXall 10 · 3 holders which blocks → HD CARRIER LLC 321J AUSTIN TX
2020-02-19 737-267 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2020-01-23 737-266 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SAN MARCOS TX
2020-01-10 737-265 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KYLE TX
2019-12-30 737-264 0–9 XXXall 10 · 7 holders which blocks → METROPCS, INC. 5562 LOCKHART TX
2019-12-30 737-348 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H BASTROP TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.