NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 20
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
2003-10-21 307-299 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 GILLETTE WY
2003-10-21 309-489 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 GENESEO IL
2003-10-21 336-356 not yet reported which blocks → PIEDMONT COMMUNICATIONS SERVICES, INC. - NC 035B DOBSON NC
2003-10-21 604-282 not yet reported which blocks → Primus Telecommunications Canada Inc. 201A Vancouver —
2003-10-21 605-295 5XXX6XXX7XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PIERRE SD
2003-10-21 605-863 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 RAPID CITY SD
2003-10-21 608-391 2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 BOSCOBEL WI
2003-10-21 613-656 not yet reported which blocks → Primus Telecommunications Canada Inc. 201A Ottawa-Hull —
2003-10-21 631-278 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 BRENTWOOD NY
2003-10-21 646-243 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN01 NY
2003-10-21 712-303 7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CLARINDA IA
2003-10-21 712-313 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 SIDNEY IA
2003-10-21 845-597 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NEWBURGH NY
2003-10-21 870-500 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CROSSETT AR
2003-10-21 870-501 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MCGEHEE AR
2003-10-21 905-218 not yet reported which blocks → Primus Telecommunications Canada Inc. 201A Hamilton —
2003-10-21 940-221 not yet reported which blocks → WEB FIRE COMMUNICATIONS, INC. - TX 2985 GRAHAM TX
2003-10-20 204-695 not yet reported which blocks → MTS Inc. 8088 Winnipeg —
2003-10-20 307-749 not yet reported which blocks → UNION TELEPHONE COMPANY 013B PINEDALE WY
2003-10-20 307-759 not yet reported which blocks → UNION TELEPHONE COMPANY 013B LUSK WY
2003-10-20 307-779 not yet reported which blocks → UNION TELEPHONE COMPANY 013B WHEATLAND WY
2003-10-20 870-690 2XXX3XXX4XXX5XXX6XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 MCGEHEE AR
2003-10-20 902-233 not yet reported which blocks → Bell Mobility Aliant 329A Halifax —
2003-10-20 902-250 not yet reported which blocks → Bell Mobility Aliant 329A Digby —
2003-10-20 902-294 not yet reported which blocks → Bell Mobility Aliant 329A Baddeck —
2003-10-20 902-523 not yet reported which blocks → Bell Mobility Aliant 329A Bridgewater —
2003-10-20 902-698 not yet reported which blocks → Bell Mobility Aliant 329A Kentville —
2003-10-20 902-956 not yet reported which blocks → Bell Mobility Aliant 329A Truro —
2003-10-20 940-244 not yet reported which blocks → WEB FIRE COMMUNICATIONS, INC. - TX 2985 WICHITAFLS TX
2003-10-17 224-208 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → ONVOY, LLC 224C BARTLETT IL
2003-10-17 843-944 0–9 XXXall 10 · 8 holders which blocks → AT&T - LOCAL 7421 DARLINGTON SC
2003-10-16 239-333 0–9 XXXall 10 · 2 holders which blocks → T3 COMMUNICATIONS, INC. - FL 469A FORT MYERS FL
2003-10-16 270-288 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → ONVOY, LLC - KY 896E MORGANTOWN KY
2003-10-16 301-525 0–9 XXXall 10 · 2 holders which blocks → QUANTUM TELECOMMUNICATIONS, INC. - MD 2596 GAITHERSBG MD
2003-10-16 541-263 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 ENTERPRISE OR
2003-10-16 620-238 4XXX5XXX6XXX7XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KS 6532 GIRARD KS
2003-10-16 678-799 0–9 XXXall 10 · 3 holders which blocks → LINGO TELECOM, LLC 0155 ATLANTA GA
2003-10-16 765-388 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NEW CASTLE IN
2003-10-16 865-377 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J HLSCRSSRDS TN
2003-10-15 256-443 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 FLORENCE AL
2003-10-15 347-307 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN06 NY
2003-10-15 352-577 0–9 XXXall 10 · 6 holders which blocks → POWERTEL JACKSONVILLE LICENSES, INC. 7472 BRONSON FL
2003-10-15 352-578 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → POWERTEL JACKSONVILLE LICENSES, INC. 7472 CROSS CITY FL
2003-10-15 386-588 0–9 XXXall 10 · 4 holders which blocks → POWERTEL JACKSONVILLE LICENSES, INC. 7472 ALACHUA FL
2003-10-15 413-213 0–9 XXXall 10 · 6 holders which blocks → AT&T - LOCAL 7421 BELCHERTN MA
2003-10-15 646-691 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN01 NY
2003-10-15 647-233 not yet reported which blocks → Bell Mobility 6574 Toronto —
2003-10-15 647-393 not yet reported which blocks → Bell Mobility 6574 Toronto —
2003-10-15 647-444 not yet reported which blocks → Bell Mobility 6574 Toronto —
2003-10-15 662-715 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → POWERTEL MEMPHIS LICENSES, INC. 7474 OXFORD MS

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.