NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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 28
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
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
2019-03-12 912-600 0–9 XXXall 10 · 3 holders which blocks → TERRA NOVA TELECOM INC. 145J SAVANNAH GA
2019-03-12 947-215 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTHFIELD MI
2019-03-11 431-558 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Winnipeg —
2019-03-11 431-668 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Winnipeg —
2019-03-11 431-778 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Winnipeg —
2019-03-11 431-855 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Winnipeg —
2019-03-11 431-866 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Winnipeg —
2019-03-11 431-877 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Winnipeg —
2019-03-11 470-461 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA NE GA
2019-03-11 571-536 0–9 XXXall 10 · 3 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 WSNGTNZN19 VA
2019-03-11 571-697 0–9 XXXall 10 · 6 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 TRIANGLE VA
2019-03-11 571-842 0–9 XXXall 10 · 5 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 WSNGTNZN08 VA
2019-03-11 628-266 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E CORTEMADRA CA
2019-03-11 628-433 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E IGNACIO CA
2019-03-11 657-373 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E PLACENTIA CA
2019-03-11 669-288 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNJS WEST CA
2019-03-11 669-305 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E GILROY CA
2019-03-08 207-421 1XXX8XXX9XXX · 2 holders which blocks → PEERLESS NETWORK OF MAINE, LLC- ME 925H WINTERPORT ME
2019-03-08 272-241 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MT CARMEL PA
2019-03-08 276-333 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H CLINTWOOD VA
2019-03-08 276-529 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H DANTE VA
2019-03-08 276-999 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H APPALACHIA VA
2019-03-08 332-209 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN01 NY
2019-03-08 405-504 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → PEERLESS NETWORK OF OKLAHOMA, LLC - OK 384H MINCO OK
2019-03-08 434-666 0XXX1XXX2XXX6XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H CHARLOTSVL VA
2019-03-08 620-871 0XXX1XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → S & T COMMUNICATIONS, LLC - KS 5910 SCOTT CITY KS
2019-03-08 639-838 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Regina —
2019-03-08 984-247 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NC 8389 RALEIGH NC
2019-03-08 986-201 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - ID 808G CALDWELL ID
2019-03-07 206-867 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H SEATTLE WA
2019-03-07 385-296 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J MIDVALE UT
2019-03-07 434-500 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 BOYDTON VA
2019-03-07 434-686 1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 BLACKSTONE VA
2019-03-07 434-837 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 KEYSVILLE VA
2019-03-07 442-305 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C PALMDESERT CA
2019-03-07 531-331 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - NE 549E MARTELL NE
2019-03-07 531-351 3XXX5XXX6XXX which blocks → ONVOY, LLC - NE 549E TABLE ROCK NE
2019-03-07 531-535 0XXX2XXX3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → ONVOY, LLC - NE 549E KENESAW NE
2019-03-07 540-500 0–9 XXXall 10 · 7 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 LOUISA VA
2019-03-07 657-657 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C ANAHEIM CA
2019-03-07 786-658 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2019-03-06 202-788 0–9 XXXall 10 · 4 holders which blocks → EXIANT COMMUNICATIONS LLC 114J WSHNGTNZN1 DC
2019-03-06 224-666 0–9 XXXall 10 · 3 holders which blocks → TERRA NOVA TELECOM INC. 145J ARLIGTNHTS IL
2019-03-06 240-664 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF MARYLAND, LLC 568G CUMBERLAND MD
2019-03-06 318-333 0–9 XXXwhole prefix which blocks → ONVOY, LLC - LA 749E MANGHAM LA
2019-03-06 365-558 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Milton —
2019-03-06 432-252 2XXX6XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EUNICE WST TX
2019-03-06 435-296 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF UTAH, LLC - UT 526H GLNCNYONCY UT
2019-03-06 531-231 0XXX2XXX3XXX4XXX5XXX6XXX8XXX · 3 holders which blocks → ONVOY, LLC - NE 549E CLAYCENTER NE
2019-03-06 531-251 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - NE 549E DAWSON NE

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.