NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 26
Rogers Communications Canada Inc. (Wireless) 23
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
2014-05-07 912-273 0–9 XXXwhole prefix which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 SAVANNAH GA
2014-05-06 312-690 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN01 IL
2014-05-06 778-361 not yet reported which blocks → Bell Mobility 6574 Prince Rupert —
2014-05-06 902-353 not yet reported which blocks → Bragg Communications Inc. 4878 Vernon River —
2014-05-06 984-355 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E ANGIER NC
2014-05-05 224-347 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 ARLIGTNHTS IL
2014-05-05 510-556 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FRNK MAIN CA
2014-05-05 518-679 0XXX1XXX2XXX · 3 holders which blocks → TVC ALBANY, INC. DBA FIRSTLIGHT FIBER 7989 COXSACKIE NY
2014-05-05 518-787 0XXX1XXX7XXX8XXX · 4 holders which blocks → TVC ALBANY, INC. DBA FIRSTLIGHT FIBER 7989 RAVENA NY
2014-05-05 872-256 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN05 IL
2014-05-02 216-352 0–9 XXXall 10 · 3 holders which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
2014-05-02 317-360 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F GREENWOOD IN
2014-05-02 323-745 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C LSAN DA 14 CA
2014-05-02 424-348 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 HAWTHORNE CA
2014-05-02 424-365 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - CA 649C W ANGELES CA
2014-05-02 469-615 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GRANDPRARI TX
2014-05-02 469-616 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GRANDPRARI TX
2014-05-02 469-617 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 MCKINNEY TX
2014-05-02 774-432 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 FRAMINGHAM MA
2014-05-02 815-242 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E MINOOKA IL
2014-05-01 252-549 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NC 638E KINSTON NC
2014-05-01 312-971 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN01 IL
2014-05-01 314-254 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MO 993E LADUE MO
2014-05-01 336-901 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E GIBSONVL NC
2014-05-01 425-305 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 KIRKLAND WA
2014-05-01 573-505 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - MO 993E GRAVOIS ML MO
2014-05-01 682-717 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ARLINGTON TX
2014-04-30 204-830 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Pine Falls —
2014-04-30 225-434 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 VACHERIE LA
2014-04-30 234-276 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F GREENSBURG OH
2014-04-30 289-501 not yet reported which blocks → Videotron Ltd. 383F St. Catharines-Thorold —
2014-04-30 419-664 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F CAREY OH
2014-04-30 440-467 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F BEREA OH
2014-04-30 475-328 0–9 XXXall 10 · 8 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 DARIEN CT
2014-04-30 520-448 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F TUCSON AZ
2014-04-30 774-385 0XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E RUTLAND MA
2014-04-30 819-284 not yet reported which blocks → 9164-3122 Quebec inc 843D St-Sebastien (Frontenac Co.) —
2014-04-30 937-860 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F YLSPGCLFTN OH
2014-04-29 458-207 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J VENETA OR
2014-04-29 470-578 0–9 XXXwhole prefix which blocks → PAETEC ITEL, LLC 829J ATLANTA NE GA
2014-04-29 720-739 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F DENVER CO
2014-04-29 754-802 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 HOLLYWOOD FL
2014-04-28 406-615 2XXX which blocks → WESTERN MONTANA COMMUNITYTEL INC. - MT 986F THOMPSNFLS MT
2014-04-28 415-985 0–9 XXXall 10 · 6 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J NOVATO CA
2014-04-28 424-353 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K SNMN MRVS CA
2014-04-28 470-327 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E COVINGTON GA
2014-04-28 505-492 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ALBUQURQUE NM
2014-04-28 631-637 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 BRENTWOOD NY
2014-04-28 646-828 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NWYRCYZN01 NY
2014-04-28 657-238 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 CYPRESS CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.