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
2012-06-27 248-234 0–9 XXXall 10 · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J SOUTHFIELD MI
2012-06-27 470-209 0–9 XXXall 10 · 3 holders which blocks → DOVETEL COMMUNICATIONS, LLC - GA 362B WINDER GA
2012-06-27 816-666 0–9 XXXall 10 · 5 holders which blocks → AVID COMMUNICATIONS, LLC - MO 718D KANSASCITY MO
2012-06-26 226-329 not yet reported which blocks → Execulink Telecom Inc. 8226 Nairn —
2012-06-26 289-830 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Oshawa —
2012-06-26 336-487 0–9 XXXwhole prefix which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 GREENSBORO NC
2012-06-26 412-888 0–9 XXXall 10 · 4 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 PTTSBGZON1 PA
2012-06-26 470-296 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 CEDARTOWN GA
2012-06-26 518-757 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 BERNE NY
2012-06-26 587-800 not yet reported which blocks → Iristel Inc. 154E Lethbridge —
2012-06-26 587-801 not yet reported which blocks → Iristel Inc. 154E Medicine Hat —
2012-06-26 587-802 not yet reported which blocks → Iristel Inc. 154E Red Deer —
2012-06-26 587-803 not yet reported which blocks → Iristel Inc. 154E Grande Prairie —
2012-06-26 717-888 0–9 XXXall 10 · 4 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 HARISBGZN1 PA
2012-06-26 720-508 0–9 XXXall 10 · 6 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 3467 DENVER CO
2012-06-26 845-640 0–9 XXXall 10 · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 FALLSBURG NY
2012-06-26 989-423 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MIDLAND MI
2012-06-25 415-423 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2012-06-25 585-435 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2012-06-25 612-300 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TWINCITIES MN
2012-06-25 872-208 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J CHICGOZN02 IL
2012-06-25 925-446 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 CONCORD CA
2012-06-22 240-800 0–9 XXXall 10 · 7 holders which blocks → CORE COMMUNICATIONS, INC.- MD 2593 WSHNGTNZN2 MD
2012-06-22 313-782 0–9 XXXall 10 · 4 holders which blocks → MICHIGAN BELL TEL CO 9323 DETROITZN1 MI
2012-06-22 385-345 0–9 XXXall 10 · 5 holders which blocks → QWEST CORPORATION 9636 LEHI UT
2012-06-22 404-390 0–9 XXXall 10 · 3 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2012-06-22 404-481 0–9 XXXall 10 · 5 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2012-06-22 404-990 0–9 XXXall 10 · 4 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2012-06-22 431-999 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Winnipeg —
2012-06-22 438-969 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Montreal —
2012-06-22 438-980 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Montreal —
2012-06-22 438-981 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Montreal —
2012-06-22 438-982 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Montreal —
2012-06-22 438-983 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Montreal —
2012-06-22 438-984 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Montreal —
2012-06-22 438-985 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Montreal —
2012-06-22 570-666 0–9 XXXall 10 · 6 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 WILLIAMSPT PA
2012-06-22 580-665 0–9 XXXall 10 · 4 holders which blocks → UNITED STATES CELLULAR - OK 6272 ADA OK
2012-06-22 646-628 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN01 NY
2012-06-22 647-849 not yet reported which blocks → Fibernetics Corporation 464D Toronto —
2012-06-22 720-553 0–9 XXXwhole prefix which blocks → QWEST CORPORATION 9636 DENVER CO
2012-06-22 772-222 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J HOBE SOUND FL
2012-06-22 772-888 0–9 XXXall 10 · 7 holders which blocks → TERRA NOVA TELECOM, INC. - FL 382G STUART FL
2012-06-22 917-565 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN04 NY
2012-06-22 928-362 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 SAFFORD AZ
2012-06-21 316-202 0–9 XXXall 10 · 2 holders which blocks → GIANT COMMUNICATIONS, INC. - KS 5237 WICHITA KS
2012-06-21 609-600 0–9 XXXall 10 · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NJ 7142 WILDWOOD NJ
2012-06-21 803-314 0–9 XXXwhole prefix which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 COLUMBIA SC
2012-06-21 850-300 0–9 XXXall 10 · 3 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J TALLAHASSE FL
2012-06-20 205-719 0–9 XXXall 10 · 3 holders which blocks → POWERTEL BIRMINGHAM LICENSES, INC. 7475 BIRMINGHAM AL

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.