NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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. 39
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 20
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
2023-02-21 650-820 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H REDWOOD CY CA
2023-02-21 848-838 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - NJ 637C PERTHAMBOY NJ
2023-02-21 901-695 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TN 525E MEMPHIS TN
2023-02-21 943-217 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA 7435 BUFORD GA
2023-02-21 949-849 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H NEWPORTBCH CA
2023-02-20 216-516 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OH 464C CLEVELAND OH
2023-02-17 229-572 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H FITZGERALD GA
2023-02-17 315-917 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → NORTHLAND NETWORKS, LTD. - NY 7556 UTICA NY
2023-02-17 319-391 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J CEDAR RPDS IA
2023-02-17 341-228 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2023-02-17 352-776 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J GAINESVL FL
2023-02-17 352-779 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 732J OCALA FL
2023-02-17 386-357 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J LAKE CITY FL
2023-02-17 386-359 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 732J PALM COAST FL
2023-02-17 406-507 0XXX1XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MT 9415 WHITEFISH MT
2023-02-17 412-764 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - PA 547E PTTSBGZON4 PA
2023-02-17 515-301 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 732J AMES IA
2023-02-17 539-273 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 732J MUSKOGEE OK
2023-02-17 561-608 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J BOCA RATON FL
2023-02-17 572-212 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J EDMOND OK
2023-02-17 639-542 not yet reported which blocks → Access Communications Co-operative Limited 280H Strasbourg —
2023-02-17 639-543 not yet reported which blocks → Access Communications Co-operative Limited 280H Glaslyn —
2023-02-17 661-604 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LANCASTER CA
2023-02-17 681-449 0XXX1XXX6XXX7XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WV 9944 WILLIAMSTN WV
2023-02-17 681-450 7XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - WV 9944 MONTGOMERY WV
2023-02-17 689-294 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 ORLANDO FL
2023-02-17 689-295 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 ORLANDO FL
2023-02-17 707-905 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LOWER LAKE CA
2023-02-17 712-416 0XXX1XXX2XXX3XXX8XXX · 5 holders which blocks → NUSO, LLC 732J CHEROKEE IA
2023-02-17 712-417 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J COUNCILBLF IA
2023-02-17 737-387 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TX 903C SAN MARCOS TX
2023-02-17 804-797 0XXX1XXX2XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WEST POINT VA
2023-02-17 828-530 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 HICKORY NC
2023-02-17 848-347 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - NJ 637C FRANKLINPK NJ
2023-02-17 913-421 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BONNER SPG KS
2023-02-17 929-664 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN05 NY
2023-02-17 929-665 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN08 NY
2023-02-17 936-693 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C CONROE TX
2023-02-17 940-510 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUBREY TX
2023-02-17 980-410 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E ALBEMARLE NC
2023-02-16 254-658 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 KILLEEN TX
2023-02-16 254-737 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX which blocks → NUSO, LLC 732J WACO TX
2023-02-16 269-401 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BATTLE CRK MI
2023-02-16 316-203 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 732J WICHITA KS
2023-02-16 325-318 0XXX1XXX2XXX3XXX8XXX9XXX · 2 holders which blocks → NUSO, LLC 732J SNYDER TX
2023-02-16 341-225 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK GRNLF CA
2023-02-16 341-227 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK OLIVR CA
2023-02-16 346-619 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J HOUSTON TX
2023-02-16 361-357 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 732J C CHRISTI TX
2023-02-16 386-367 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J DAYTONABCH FL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.