NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

355 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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. 38
ONVOY, LLC - CA 31
NEW CINGULAR WIRELESS PCS, LLC - IL 28
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2010-02-22 613-426 not yet reported which blocks → Bragg Communications Inc. 4878 Bourget —
2010-02-22 613-427 not yet reported which blocks → Bragg Communications Inc. 4878 Casselman —
2010-02-22 613-436 not yet reported which blocks → Bragg Communications Inc. 4878 Chesterville —
2010-02-22 613-441 not yet reported which blocks → Bragg Communications Inc. 4878 Winchester —
2010-02-22 785-677 not yet reported which blocks → NEX-TECH, LLC - KS 4366 HOXIE KS
2010-02-22 805-328 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SIMIVALLEY CA
2010-02-22 818-570 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E VAN NUYS CA
2010-02-22 818-835 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E CANOGAPARK CA
2010-02-22 818-850 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E NO HOLLYWD CA
2010-02-22 818-934 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E BRBN BRBN CA
2010-02-22 909-521 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E S BERNDINO CA
2010-02-22 909-529 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E CHINO CA
2010-02-22 909-833 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E CLAREMONT CA
2010-02-19 252-696 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC 7835 SCOTLDNECK NC
2010-02-19 304-240 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 FALLNGWTRS WV
2010-02-19 308-545 1XXX2XXX3XXX5XXX7XXX · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K BAYARD NE
2010-02-19 347-490 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 NWYRCYZN03 NY
2010-02-19 405-432 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SHAWNEE OK
2010-02-19 570-591 0–9 XXXall 10 · 4 holders which blocks → CTSI, INC. - PA 7513 SCRANTON PA
2010-02-19 573-741 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARBLEHILL MO
2010-02-19 608-593 0–9 XXXall 10 · 6 holders which blocks → MICHIGAN WIRELESS, LLC DBA BUG TUSSEL WIRELESS 698E REEDSBURG WI
2010-02-19 646-380 0–9 XXXwhole prefix which blocks → PAETEC ITEL, LLC 829J NWYRCYZN01 NY
2010-02-19 734-219 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLCV - MI 543C YPSILANTI MI
2010-02-19 805-303 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 SATICOY CA
2010-02-19 918-236 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 TELECOM OF OKLAHOMA, LLC - OK 7632 TULSA OK
2010-02-19 989-455 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLCV - MI 543C VASSAR MI
2010-02-18 204-800 not yet reported which blocks → Iristel Inc. 154E Winnipeg —
2010-02-18 289-230 not yet reported which blocks → TELUS Mobility 8303 Burlington —
2010-02-18 334-557 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J MONTGOMERY AL
2010-02-18 403-904 not yet reported which blocks → Shaw Telecom Inc. 497E Pincher Creek —
2010-02-18 450-673 not yet reported which blocks → TELUS Quebec 2243 St-Lambert —
2010-02-18 450-697 not yet reported which blocks → TELUS Quebec 2243 Pont-Viau —
2010-02-18 512-222 0–9 XXXall 10 · 3 holders which blocks → EVOLVE CELLULAR, INC. 139F AUSTIN TX
2010-02-18 512-516 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2010-02-18 581-375 not yet reported which blocks → Videotron Ltd. 8306 Sainte-Marie-de-Beauce —
2010-02-18 740-722 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 COSHOCTON OH
2010-02-18 760-906 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 RAMONA CA
2010-02-18 806-448 5XXX6XXX7XXX · 2 holders which blocks → TERRA NOVA TELECOM INC. 145J LUBBOCK TX
2010-02-17 225-347 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 TELECOM OF LOUISIANA, LLC - LA 7488 DENHAM SPG LA
2010-02-17 313-451 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN6 MI
2010-02-17 336-546 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C WINSTN SAL NC
2010-02-17 337-284 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 TELECOM OF LOUISIANA, LLC - LA 7488 OPELOUSAS LA
2010-02-17 401-426 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 CUMBLND HL RI
2010-02-17 402-512 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NE 995E FREMONT NE
2010-02-17 404-566 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 ATLANTA GA
2010-02-17 475-201 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 NEW HAVEN CT
2010-02-17 520-262 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 TUCSON AZ
2010-02-17 606-431 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ELKHORN CY KY
2010-02-17 678-675 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 NEWNAN GA
2010-02-17 709-271 not yet reported which blocks → Bragg Communications Inc. 4878 Lourdes —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.