NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

334 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 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
2020-11-27 979-899 0XXX1XXX2XXX3XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H CALVERT TX
2020-11-26 249-660 not yet reported which blocks → Fibernetics Corporation 464D Collingwood —
2020-11-26 437-630 not yet reported which blocks → Bell Mobility 6574 Toronto —
2020-11-26 438-486 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-11-26 548-569 not yet reported which blocks → Fibernetics Corporation 464D Auburn —
2020-11-25 213-546 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J LSAN DA 06 CA
2020-11-25 319-380 0–9 XXXall 10 · 5 holders which blocks → STRATUS NETWORKS 495J BURLINGTON IA
2020-11-25 321-353 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 COCOA FL
2020-11-25 346-788 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H LEAGUECITY TX
2020-11-25 415-605 0–9 XXXall 10 · 3 holders which blocks → IP HORIZON LLC 515J SNFC CNTRL CA
2020-11-25 458-257 0–9 XXXall 10 · 7 holders which blocks → UNITED STATES CELLULAR - OR 6349 GRANTSPASS OR
2020-11-25 463-246 0–9 XXXall 10 · 2 holders which blocks → STRATUS NETWORKS 495J INDIANAPLS IN
2020-11-25 470-749 0–9 XXXall 10 · 3 holders which blocks → IP HORIZON LLC 515J ATLANTA GA
2020-11-25 484-763 0–9 XXXall 10 · 6 holders which blocks → CTSI, INC. - PA 7513 ALLENTOWN PA
2020-11-25 548-559 not yet reported which blocks → Fibernetics Corporation 464D Simcoe —
2020-11-25 548-560 not yet reported which blocks → Fibernetics Corporation 464D Stratford —
2020-11-25 559-581 0–9 XXXall 10 · 3 holders which blocks → IP HORIZON LLC 515J FRESNO CA
2020-11-25 574-366 0–9 XXXall 10 · 3 holders which blocks → STRATUS NETWORKS 495J SOUTH BEND IN
2020-11-25 619-837 0–9 XXXall 10 · 6 holders which blocks → IP HORIZON LLC 515J SNDG SNDG CA
2020-11-25 661-624 0–9 XXXall 10 · 5 holders which blocks → IP HORIZON LLC 515J BKFD SOUTH CA
2020-11-25 689-225 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - FL 937C WINTERGRDN FL
2020-11-25 707-859 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ROSA CA
2020-11-25 737-338 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C ELGIN TX
2020-11-25 779-325 1XXX3XXX5XXX · 3 holders which blocks → STRATUS NETWORKS 495J FRANKLIGRV IL
2020-11-25 805-802 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → IP HORIZON LLC 515J SNLUSOBSPO CA
2020-11-25 814-930 0XXX1XXX2XXX3XXX4XXX7XXX · 5 holders which blocks → IDT AMERICA, CORP. - PA 213C MILLHEIM PA
2020-11-25 916-902 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J SCRM MAIN CA
2020-11-24 385-373 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2020-11-24 435-523 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - UT 871E ST GEORGE UT
2020-11-24 470-713 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA 7435 ATLANTA SO GA
2020-11-24 484-617 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NUSO, LLC 478J CHESTERSPG PA
2020-11-24 505-446 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FARMINGTON NM
2020-11-24 505-535 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NM 206F FARMINGTON NM
2020-11-24 540-734 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CHANCELLOR VA
2020-11-24 551-315 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 RAMSEY NJ
2020-11-24 573-613 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 FULTON MO
2020-11-24 662-405 0XXX3XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 MANTACHIE MS
2020-11-24 662-409 0XXX1XXX2XXX3XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 FULTON MS
2020-11-24 662-421 0XXX4XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 TREMONT MS
2020-11-24 681-223 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - WV 449F NEWCUMBRLD WV
2020-11-24 681-585 0XXX3XXX5XXX6XXX8XXX · 4 holders which blocks → ONVOY, LLC - WV 449F MIDDLEBORN WV
2020-11-24 681-595 0XXX1XXX2XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → ONVOY, LLC - WV 449F EAST BANK WV
2020-11-24 681-695 0XXX1XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → ONVOY, LLC - WV 449F LUMBERPORT WV
2020-11-24 681-699 0XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - WV 449F PADEN CITY WV
2020-11-24 681-771 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - WV 449F ATHENS WV
2020-11-24 681-821 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - WV 449F WILLIAMSON WV
2020-11-24 681-822 0XXX1XXX2XXX3XXX4XXX9XXX · 4 holders which blocks → ONVOY, LLC - WV 449F WESTON WV
2020-11-24 681-887 4XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - WV 449F THOMAS WV
2020-11-24 720-756 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 DENVER CO
2020-11-24 720-781 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LONGMONT CO

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.