NumberResearch Membership · Data 09/24/2026

Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026

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 31
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
ONVOY, LLC - NJ 15
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
2012-02-06 587-353 not yet reported which blocks → Shaw Telecom Inc. 497E Calgary —
2012-02-06 587-521 not yet reported which blocks → Shaw Telecom Inc. 497E Edmonton —
2012-02-06 605-906 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA SD-LLC 693G SIOUX FLS SD
2012-02-06 614-702 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 COLUMBUS OH
2012-02-06 631-408 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 AMITYVILLE NY
2012-02-06 705-302 not yet reported which blocks → Iristel Inc. 154E Barrie —
2012-02-06 740-540 0–9 XXXwhole prefix which blocks → CHILLICOTHE TEL. CO. 0597 CHILLICOTH OH
2012-02-06 814-646 0XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → WINDSTREAM PENNSYLVANIA, INC. 0176 BROOKVILLE PA
2012-02-06 917-702 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN07 NY
2012-02-06 919-864 0–9 XXXall 10 · 6 holders which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 4334 DURHAM NC
2012-02-03 318-924 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 TELECOM OF LOUISIANA, LLC - LA 7488 BLANCHARD LA
2012-02-03 404-662 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA 7435 ATLANTA GA
2012-02-03 406-508 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MT 9415 FRENCHTOWN MT
2012-02-03 504-405 0–9 XXXall 10 · 3 holders which blocks → VOICESTREAM GSM I, LLC 150C KENNER LA
2012-02-03 575-245 not yet reported which blocks → SIERRA COMMUNICATIONS, INC. - NM 713G RATON NM
2012-02-03 614-715 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J COLUMBUS OH
2012-02-03 631-483 0–9 XXXall 10 · 6 holders which blocks → TELENGY L.L.C. - NY 473G MONTAUK PT NY
2012-02-02 330-905 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MARLBORO OH
2012-02-02 440-208 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 BRECKSVL OH
2012-02-02 440-314 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 BEREA OH
2012-02-02 614-650 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 GAHANNA OH
2012-02-01 438-491 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2012-02-01 438-492 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2012-02-01 470-239 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 CUMMING GA
2012-02-01 502-528 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KY 6500 LOUISVILLE KY
2012-02-01 502-612 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KY 6500 LOUISVILLE KY
2012-02-01 502-771 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 BLOOMFIELD KY
2012-02-01 614-701 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 COLUMBUS OH
2012-02-01 631-402 0–9 XXXall 10 · 5 holders which blocks → TELENGY L.L.C. - NY 473G BRENTWOOD NY
2012-02-01 716-671 0–9 XXXall 10 · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K WESTSENECA NY
2012-02-01 716-768 0–9 XXXall 10 · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K BUFFALO NY
2012-02-01 775-404 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NV 7376 FERNLEY NV
2012-02-01 845-767 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF NEW YORK, LLC - NY 155E CONGERS NY
2012-02-01 901-207 0–9 XXXall 10 · 4 holders which blocks → POWERTEL MEMPHIS LICENSES, INC. 7474 MEMPHIS TN
2012-02-01 904-330 0–9 XXXall 10 · 4 holders which blocks → POWERTEL JACKSONVILLE LICENSES, INC. 7472 JACKSONVL FL
2012-02-01 904-423 0–9 XXXall 10 · 5 holders which blocks → POWERTEL JACKSONVILLE LICENSES, INC. 7472 JACKSONVL FL
2012-02-01 913-214 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J KANSASCITY KS
2012-02-01 914-326 0–9 XXXall 10 · 6 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 PLEASANTVL NY
2012-01-31 352-405 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 BRONSON FL
2012-01-31 513-516 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2012-01-31 513-601 0–9 XXXall 10 · 3 holders which blocks → CINCINNATI BELL 9348 CINCINNATI OH
2012-01-31 806-208 4XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HEDLEY TX
2012-01-31 832-610 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SPRING TX
2012-01-31 832-612 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 RICHMNRNBG TX
2012-01-31 870-412 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 MONTICELLO AR
2012-01-31 870-551 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 W MEMPHIS AR
2012-01-31 954-505 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF FLORIDA, LLC - FL 902E HOLLYWOOD FL
2012-01-30 201-957 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NJ 118F HACKENSACK NJ
2012-01-30 208-907 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - ID 192F WEISER ID
2012-01-30 270-861 0–9 XXXall 10 · 7 holders which blocks → WINDSTREAM KENTUCKY EAST, INC. - LEXINGTON 9690 GLASGOW KY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.