NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

2 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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 747
ONVOY, LLC - CA 2
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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2023-03-10 747-332 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 VAN NUYS CA
2023-03-01 747-774 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C CANOGAPARK CA
2023-01-19 747-331 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 GLENDALE CA
2023-01-13 747-717 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C NO HOLLYWD CA
2023-01-13 747-727 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C VAN NUYS CA
2023-01-11 747-324 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 NO HOLLYWD CA
2023-01-11 747-329 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BRBN BRBN CA
2022-11-18 747-447 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C SNFN SNFN CA
2022-10-24 747-317 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E PSDN LACN CA
2022-10-18 747-325 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SNFN PACM CA
2022-10-18 747-328 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SNFN SPLV CA
2022-09-08 747-338 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C GLENDALE CA
2022-09-02 747-745 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 NORTHRIDGE CA
2022-06-09 747-355 0–9 XXXall 10 · 3 holders which blocks → BARR TELL USA, LLC 026K NO HOLLYWD CA
2022-04-27 747-766 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H VAN NUYS CA
2022-04-27 747-922 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H RESEDA CA
2022-03-23 747-342 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H LACRSCENTA CA
2022-03-23 747-366 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H NORTHRIDGE CA
2022-03-23 747-567 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H BRBN BRBN CA
2022-03-23 747-667 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H SUNLD TJNG CA
2022-02-10 747-318 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CANOGAPARK CA
2022-02-07 747-463 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CANOGAPARK CA
2022-01-13 747-837 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J AGOURA CA
2022-01-12 747-326 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E BRBN SNVY CA
2022-01-12 747-767 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SNFN GRHL CA
2022-01-12 747-832 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SNFN SNFN CA
2022-01-11 747-426 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SNFN PACM CA
2022-01-10 747-327 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C VAN NUYS CA
2022-01-10 747-466 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NO HOLLYWD CA
2022-01-10 747-746 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J RESEDA CA
2022-01-10 747-836 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NORTHRIDGE CA
2022-01-07 747-321 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 SNFN PACM CA
2022-01-07 747-367 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BRBN BRBN CA
2021-12-10 747-320 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CANOGAPARK CA
2021-12-09 747-441 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C GLENDALE CA
2021-12-08 747-306 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 GLENDALE CA
2021-11-10 747-308 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BRBN BRBN CA
2021-10-28 747-488 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H SNFN SNFN CA
2021-10-13 747-319 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BRBN SNVY CA
2021-09-22 747-316 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BRBN BRBN CA
2021-09-22 747-348 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H CANOGAPARK CA
2021-09-22 747-577 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H RESEDA CA
2021-09-17 747-397 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SNFN SPLV CA
2021-08-31 747-330 0–9 XXXall 10 · 3 holders which blocks → UTILITY TELECOM GROUP, LLC - CA 9262 GLENDALE CA
2021-08-05 747-499 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H VAN NUYS CA
2021-07-16 747-566 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H GLENDALE CA
2021-07-15 747-966 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H SNFN GRHL CA
2021-07-07 747-677 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H BRBN BRBN CA
2021-07-07 747-699 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → FRACTEL, LLC 965H SUNLD TJNG CA
2021-07-07 747-799 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H NORTHRIDGE CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.