NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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
2005-09-23 250-316 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Quesnel —
2005-09-23 250-436 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Chemainus —
2005-09-23 417-988 7XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 SPRINGFLD MO
2005-09-23 714-656 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SANTA ANA CA
2005-09-23 785-671 not yet reported which blocks → S & T COMMUNICATIONS, LLC - KS 5910 OAKLEY KS
2005-09-23 832-353 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2005-09-23 909-782 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FONTANA CA
2005-09-23 910-573 3XXX4XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 TROY NC
2005-09-22 218-623 none assigned yet which blocks → ONVOY, LLC - MN 184D DULUTH MN
2005-09-22 248-714 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7279 MILFDWH LK MI
2005-09-22 260-788 4XXX7XXX8XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 HOWE IN
2005-09-22 260-993 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 MONGO IN
2005-09-22 503-545 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2005-09-22 517-755 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LANSING MI
2005-09-22 567-336 0–9 XXXall 10 · 4 holders which blocks → OHIO BELL TEL CO 9321 PERRYSBURG OH
2005-09-22 574-696 1XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 MILFORD IN
2005-09-22 734-868 0XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → ONVOY, LLCV - MI 543C IDA MI
2005-09-22 814-412 6XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SAEGERTOWN PA
2005-09-22 814-510 2XXX7XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CONNEAUTLK PA
2005-09-22 989-321 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SAGINAW MI
2005-09-21 416-519 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Toronto —
2005-09-21 509-414 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → COMCAST IP PHONE, LLC 318J ELK-GRNBLF WA
2005-09-21 607-320 0–9 XXXall 10 · 8 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K BAINBRIDGE NY
2005-09-21 607-713 2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K OXFORD NY
2005-09-21 623-433 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2005-09-21 760-987 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 VICTORVL CA
2005-09-21 785-620 0–9 XXXall 10 · 6 holders which blocks → NEX-TECH WIRELESS, LLC 122D SMITH CTR KS
2005-09-21 920-504 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K SEYMOUR WI
2005-09-21 972-325 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SEAGOVILLE TX
2005-09-20 541-550 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 BEND OR
2005-09-20 850-794 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 GREENSBORO FL
2005-09-20 919-339 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 OXFORD NC
2005-09-20 919-440 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 GOLDSBORO NC
2005-09-20 919-628 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 FOUR OAKS NC
2005-09-20 919-901 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 KENLY NC
2005-09-19 202-580 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DC 6402 WSHNGTNZN1 DC
2005-09-19 281-789 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J PINEHURST TX
2005-09-19 347-617 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 NWYRCYZN08 NY
2005-09-19 347-730 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 NWYRCYZN08 NY
2005-09-19 347-853 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN06 NY
2005-09-19 347-860 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN07 NY
2005-09-19 480-321 0–9 XXXall 10 · 3 holders which blocks → QWEST CORPORATION 9636 PHOENIX AZ
2005-09-19 516-717 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NASSAUZN01 NY
2005-09-19 516-761 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
2005-09-19 580-425 1XXX2XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 APACHE OK
2005-09-19 646-957 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN01 NY
2005-09-19 727-612 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 CLEARWATER FL
2005-09-19 727-873 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 STPETERSBG FL
2005-09-19 845-803 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 MAHOPAC NY
2005-09-19 857-413 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.