NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

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. 39
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
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
2004-09-29 912-306 0–9 XXXall 10 · 4 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 SAVANNAH GA
2004-09-28 229-352 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA 7435 ALBANY GA
2004-09-28 501-246 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J LITTLEROCK AR
2004-09-28 541-789 0–9 XXXwhole prefix which blocks → QWEST CORPORATION 9638 MEDFORD OR
2004-09-28 561-574 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 WPALMBEACH FL
2004-09-28 567-275 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 SHELBY OH
2004-09-28 570-867 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SAYRE PA
2004-09-28 617-785 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2004-09-28 678-619 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA SO GA
2004-09-28 706-715 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ATHENS GA
2004-09-28 706-814 0–9 XXXall 10 · 4 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 AUGUSTA GA
2004-09-28 732-749 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BELMAR NJ
2004-09-28 732-894 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → METROPCS, INC. 5562 BELMAR NJ
2004-09-28 773-499 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-09-27 330-765 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ORRVILLE OH
2004-09-27 404-380 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 ATLANTA GA
2004-09-27 613-323 not yet reported which blocks → Bell Mobility 6574 Ottawa-Hull —
2004-09-27 803-257 0–9 XXXall 10 · 2 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 NO AUGUSTA SC
2004-09-27 803-740 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 COLUMBIA SC
2004-09-27 843-310 0–9 XXXall 10 · 4 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 LOWCOUNTRY SC
2004-09-27 843-360 0–9 XXXall 10 · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 MYRTLE BCH SC
2004-09-27 843-415 0–9 XXXall 10 · 3 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 HILTONHEAD SC
2004-09-27 843-472 0–9 XXXall 10 · 4 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 FLORENCE SC
2004-09-27 905-230 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Brampton —
2004-09-27 905-232 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Cooksville —
2004-09-27 905-237 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Richmond Hill —
2004-09-27 905-239 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Ajax-Pickering —
2004-09-27 905-240 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Oshawa —
2004-09-24 224-217 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DESPLAINES IL
2004-09-24 316-217 0–9 XXXall 10 · 4 holders which blocks → UNITED STATES CELLULAR - KS 6267 WHITEWATER KS
2004-09-24 514-718 not yet reported which blocks → Bell Mobility 6574 Montreal —
2004-09-24 708-245 0–9 XXXwhole prefix which blocks → ILLINOIS BELL TEL CO 9329 LA GRANGE IL
2004-09-24 773-366 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2004-09-24 780-237 not yet reported which blocks → Bell Mobility 6574 Edmonton —
2004-09-24 786-220 0–9 XXXall 10 · 2 holders which blocks → FUSION CLOUD SERVICES, LLC 206A MIAMI FL
2004-09-24 843-330 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 CHARLESTON SC
2004-09-24 843-331 0–9 XXXall 10 · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 EASTCONWAY SC
2004-09-24 904-235 0–9 XXXwhole prefix which blocks → POWERTEL JACKSONVILLE LICENSES, INC. 7472 JACKSONVL FL
2004-09-24 904-236 0–9 XXXall 10 · 3 holders which blocks → POWERTEL JACKSONVILLE LICENSES, INC. 7472 JACKSONVL FL
2004-09-24 904-238 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 JACKSONVL FL
2004-09-23 254-387 not yet reported which blocks → GLOBALSTAR USA, INC. 3685 WACO TX
2004-09-23 347-350 0–9 XXXall 10 · 3 holders which blocks → CSC VOICE, LLC 612K NWYRCYZN06 NY
2004-09-23 480-766 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2004-09-23 515-324 0–9 XXXwhole prefix which blocks → QWEST CORPORATION 9631 DES MOINES IA
2004-09-23 870-629 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 W MEMPHIS AR
2004-09-23 919-223 0–9 XXXall 10 · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 GOLDSBORO NC
2004-09-22 251-269 0–9 XXXall 10 · 3 holders which blocks → ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 FOLEY AL
2004-09-22 252-288 0–9 XXXall 10 · 4 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 NEW BERN NC
2004-09-22 252-686 0–9 XXXall 10 · 4 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 KINSTON NC
2004-09-22 252-864 0–9 XXXall 10 · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 GREENVILLE NC

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.