NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
2018-02-14 207-387 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - ME 882G PORTLAND ME
2018-02-14 252-999 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - NC 638E GREENVILLE NC
2018-02-14 782-469 not yet reported which blocks → Bragg Communications Inc. 4878 Country Harbour —
2018-02-14 782-474 not yet reported which blocks → Bragg Communications Inc. 4878 Melrose —
2018-02-14 782-476 not yet reported which blocks → Bragg Communications Inc. 4878 Freeport —
2018-02-14 782-477 not yet reported which blocks → Bragg Communications Inc. 4878 Port Dufferin —
2018-02-14 782-478 not yet reported which blocks → Bragg Communications Inc. 4878 Lake Charlotte —
2018-02-14 782-481 not yet reported which blocks → Bragg Communications Inc. 4878 Tangier —
2018-02-14 804-522 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J MECHANCSVL VA
2018-02-14 807-255 not yet reported which blocks → KMTS, a division of Bell Canada 8218 Kenora —
2018-02-14 807-265 not yet reported which blocks → Dryden Municipal Telephone System 8210 Dryden —
2018-02-14 825-351 not yet reported which blocks → Bell West Inc. 2933 Calgary —
2018-02-14 825-352 not yet reported which blocks → Bell West Inc. 2933 Medicine Hat —
2018-02-14 825-353 not yet reported which blocks → Bell West Inc. 2933 Edmonton —
2018-02-14 825-354 not yet reported which blocks → Bell West Inc. 2933 Grande Prairie —
2018-02-14 825-355 not yet reported which blocks → Bell West Inc. 2933 Lethbridge —
2018-02-14 825-356 not yet reported which blocks → Bell West Inc. 2933 Red Deer —
2018-02-14 825-357 not yet reported which blocks → Bell West Inc. 2933 Fort McMurray —
2018-02-14 825-358 not yet reported which blocks → Bell West Inc. 2933 St. Albert —
2018-02-14 870-380 0XXX1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → E. RITTER COMMUNICATIONS, LLC 128L PINE BLUFF AR
2018-02-13 236-491 not yet reported which blocks → Bell West Inc. 2933 Victoria —
2018-02-13 236-492 not yet reported which blocks → Bell West Inc. 2933 Kelowna —
2018-02-13 236-493 not yet reported which blocks → Bell West Inc. 2933 Abbotsford —
2018-02-13 236-494 not yet reported which blocks → Bell West Inc. 2933 Prince George —
2018-02-13 236-495 not yet reported which blocks → Bell West Inc. 2933 Vancouver —
2018-02-13 236-496 not yet reported which blocks → Bell West Inc. 2933 Nanaimo —
2018-02-13 236-497 not yet reported which blocks → Bell West Inc. 2933 Vernon —
2018-02-13 236-498 not yet reported which blocks → Bell West Inc. 2933 Penticton —
2018-02-13 463-999 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IN 097D INDIANAPLS IN
2018-02-13 479-327 0XXX1XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 STRICKLER AR
2018-02-13 479-328 0XXX1XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 MORROW AR
2018-02-13 539-223 not yet reported which blocks → CROSS CABLE TELEVISION, LLC - OK 809H STIGLER OK
2018-02-13 539-226 not yet reported which blocks → CROSS CABLE TELEVISION, LLC - OK 809H CHECOTAH OK
2018-02-13 551-230 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NJ 637C ENGLEWOOD NJ
2018-02-13 602-825 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J PHOENIX AZ
2018-02-13 667-230 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF MARYLAND, LLC 568G CENTREVL MD
2018-02-13 812-979 0–9 XXXall 10 · 5 holders which blocks → SEI DATA, INC. - IN 4704 NO VERNON IN
2018-02-13 857-343 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2018-02-13 939-450 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-13 939-451 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-13 939-454 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-13 939-456 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-13 939-457 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-13 939-458 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-13 939-460 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-13 939-499 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-13 985-800 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - LA 749E MADISONVL LA
2018-02-12 319-412 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CEDAR RPDS IA
2018-02-12 563-396 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 DAVENPORT IA
2018-02-12 669-277 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SUNNYVALE CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.