NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
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
2021-11-17 279-901 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H ELK GROVE CA
2021-11-17 346-525 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRING TX
2021-11-17 409-270 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HTCHCCKSNF TX
2021-11-17 445-225 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 PHLDLPHZN2 PA
2021-11-17 509-986 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ELLENSBURG WA
2021-11-17 559-902 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H SANGER CA
2021-11-17 575-280 0XXX1XXX2XXX3XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NM 123F QUESTA NM
2021-11-17 657-534 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ORANGE CA
2021-11-17 667-368 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 ELKTON MD
2021-11-17 667-369 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 CATONSVL MD
2021-11-17 713-810 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H TOMBALL TX
2021-11-17 720-901 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H DENVER CO
2021-11-17 743-238 0–9 XXXall 10 · 4 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 ASHEBORO NC
2021-11-17 802-416 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - VT 005F BRATTLEBO VT
2021-11-17 838-251 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 SCHENCTADY NY
2021-11-17 845-898 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MONTICELLO NY
2021-11-17 901-658 0–9 XXXwhole prefix which blocks → POWERTEL MEMPHIS LICENSES, INC. 7474 MEMPHIS TN
2021-11-17 931-633 2XXX3XXX4XXX6XXX8XXX9XXX · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F LYLES TN
2021-11-17 945-236 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ROCKWALL TX
2021-11-17 951-598 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 ARLINGTON CA
2021-11-17 951-904 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H TEMECULA CA
2021-11-16 220-901 9XXX which blocks → ONVOY SPECTRUM, LLC 624H GUYSVILLE OH
2021-11-16 220-902 2XXX8XXX9XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H BARLOW OH
2021-11-16 251-374 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H MOBILE AL
2021-11-16 346-902 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H DICKINSON TX
2021-11-16 386-340 0–9 XXXall 10 · 2 holders which blocks → POWERTEL JACKSONVILLE LICENSES, INC. 7472 ALACHUA FL
2021-11-16 424-902 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H SNMN SNMN CA
2021-11-16 458-901 0XXX2XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H COOS BAY OR
2021-11-16 470-883 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2021-11-16 506-254 not yet reported which blocks → TELUS Mobility 8303 Bathurst —
2021-11-16 579-399 not yet reported which blocks → IXICA Communications Inc. 812H Chomedey —
2021-11-16 579-577 not yet reported which blocks → IXICA Communications Inc. 812H St-Vincent-de-Paul —
2021-11-16 579-590 not yet reported which blocks → IXICA Communications Inc. 812H Ste-Rose —
2021-11-16 579-599 not yet reported which blocks → IXICA Communications Inc. 812H Laval-Est —
2021-11-16 579-699 not yet reported which blocks → IXICA Communications Inc. 812H Laval-Ouest —
2021-11-16 626-901 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H COVINA CA
2021-11-16 640-218 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NJ 118F DENNISVL NJ
2021-11-16 662-530 0XXX1XXX9XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - MS 992E SHANNON MS
2021-11-16 680-322 0–9 XXXall 10 · 3 holders which blocks → TERRA NOVA TELECOM INC. 145J SYRACUSE NY
2021-11-16 680-901 9XXX which blocks → ONVOY SPECTRUM, LLC 624H DE RUYTER NY
2021-11-16 727-454 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 CLEARWATER FL
2021-11-16 742-988 not yet reported which blocks → TELUS Mobility 8303 Ajax-Pickering —
2021-11-16 754-276 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 FTLAUDERDL FL
2021-11-16 754-279 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H FTLAUDERDL FL
2021-11-16 765-699 0XXX9XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F CHESTERFLD IN
2021-11-16 765-704 0XXX2XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F BUNKERHILL IN
2021-11-16 765-709 0XXX1XXX3XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F ATTICA IN
2021-11-16 769-277 0XXX1XXX6XXX7XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MS 992E MAGNOLIA MS
2021-11-16 774-496 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BROCKTON MA
2021-11-16 845-488 0XXX1XXX2XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NORTHCLOVE NY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.