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
2004-09-22 714-250 0–9 XXXwhole prefix which blocks → PACIFIC BELL 9740 SANTA ANA CA
2004-09-22 828-544 0–9 XXXall 10 · 9 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 MORGANTON NC
2004-09-22 828-676 0–9 XXXall 10 · 4 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 ARDEN NC
2004-09-22 843-314 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J PAWLEYS IS SC
2004-09-22 910-333 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K JACKSONVL NC
2004-09-22 910-465 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 WILMINGTON NC
2004-09-22 910-706 0–9 XXXall 10 · 4 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 LAURINBURG NC
2004-09-22 910-887 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC 7835 LUMBERTON NC
2004-09-22 910-922 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 FAYETTEVL NC
2004-09-22 928-310 3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 FLAGSTAFF AZ
2004-09-22 928-420 7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 PRESCOTT AZ
2004-09-22 928-451 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 SEDONA AZ
2004-09-21 306-280 not yet reported which blocks → SaskTel Mobility 9868 Saskatoon —
2004-09-21 306-527 not yet reported which blocks → SaskTel Mobility 9868 Regina —
2004-09-21 315-274 0–9 XXXall 10 · 7 holders which blocks → SLIC NETWORK SOLUTIONS, INC. - NY 193C POTSDAM NY
2004-09-21 469-744 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GRANDPRARI TX
2004-09-21 514-666 not yet reported which blocks → Zayo Canada Inc. 8304 Montreal —
2004-09-21 570-423 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 SAYRE PA
2004-09-21 573-846 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PERRYVILLE MO
2004-09-21 910-722 0–9 XXXall 10 · 9 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 CARTHAGE NC
2004-09-20 509-215 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DAVENPORT WA
2004-09-20 540-322 0–9 XXXall 10 · 6 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 FREDECKSBG VA
2004-09-20 571-271 0–9 XXXall 10 · 2 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 LEESBURG VA
2004-09-20 660-988 3XXX4XXX5XXX6XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 KIRKSVILLE MO
2004-09-20 662-833 0XXX1XXX3XXX7XXX8XXX9XXX · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 6396 SUMNER MS
2004-09-20 670-488 not yet reported which blocks → GUAM WIRELESS TELEPHONE COMPANY, LLC 4974 TINIAN —
2004-09-20 757-214 0–9 XXXall 10 · 3 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 NRFOLKZON1 VA
2004-09-20 757-310 0–9 XXXall 10 · 4 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 NWPTNWSZN1 VA
2004-09-20 804-212 0–9 XXXall 10 · 4 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 RICHMOND VA
2004-09-20 804-277 0–9 XXXall 10 · 6 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 MECHANCSVL VA
2004-09-20 907-720 not yet reported which blocks → GCI COMMUNICATION CORP. DBA GENERAL COMMUNICATION 6872 ANCHORAGE AK
2004-09-19 804-454 0–9 XXXall 10 · 5 holders which blocks → VERIZON VIRGINIA, INC. 9213 CHESTER VA
2004-09-17 207-400 0–9 XXXall 10 · 3 holders which blocks → BELL ATLANTIC MOBILE, INC 6386 PORTLAND ME
2004-09-17 418-931 not yet reported which blocks → Bell Mobility 6574 Quebec —
2004-09-17 503-664 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 BEAVER OR
2004-09-17 514-716 not yet reported which blocks → Bell Mobility 6574 Montreal —
2004-09-17 670-588 not yet reported which blocks → GUAM WIRELESS TELEPHONE COMPANY, LLC 4974 ROTA —
2004-09-17 845-709 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NEW CITY NY
2004-09-16 207-504 0–9 XXXall 10 · 5 holders which blocks → BELL ATLANTIC MOBILE, INC 6386 BRUNSWICK ME
2004-09-16 216-799 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OH 464C CLEVELAND OH
2004-09-16 352-658 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TRENTON FL
2004-09-16 416-557 not yet reported which blocks → Bell Mobility 6574 Toronto —
2004-09-16 425-256 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 BELLEVUE WA
2004-09-16 443-566 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 CHESAPKECY MD
2004-09-16 514-715 not yet reported which blocks → Bell Mobility 6574 Montreal —
2004-09-16 541-709 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 ONTARIO OR
2004-09-16 567-855 0XXX1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 8 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7158 CLYDE OH
2004-09-16 731-256 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J JACKSON TN
2004-09-16 814-203 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 COUDERSPT PA
2004-09-15 864-990 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 GREENVILLE SC

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.