NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

372 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 27
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Oct 2026 Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2018-06-05 629-233 0XXX3XXX · 2 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K FOSTERVL TN
2018-06-05 779-256 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D ROCKFORD IL
2018-06-05 782-983 not yet reported which blocks → Distributel 081E St. Margarets —
2018-06-05 782-984 not yet reported which blocks → Distributel 081E Tangier —
2018-06-05 782-992 not yet reported which blocks → Distributel 081E Wolfville —
2018-06-05 782-993 not yet reported which blocks → Distributel 081E Advocate —
2018-06-05 782-994 not yet reported which blocks → Distributel 081E Bass River —
2018-06-05 782-995 not yet reported which blocks → Distributel 081E Blandford —
2018-06-05 782-996 not yet reported which blocks → Distributel 081E Brookfield —
2018-06-05 782-997 not yet reported which blocks → Distributel 081E Brooklyn —
2018-06-05 782-998 not yet reported which blocks → Distributel 081E Caledonia —
2018-06-05 782-999 not yet reported which blocks → Distributel 081E Chelsea —
2018-06-05 910-945 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D WILMINGTON NC
2018-06-05 930-203 0XXX1XXX3XXX8XXX9XXX · 2 holders which blocks → VONAGE AMERICA LLC 197D BLOOMINGTN IN
2018-06-05 930-204 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VONAGE AMERICA LLC 197D EVANSVILLE IN
2018-06-05 931-275 0XXX which blocks → CHARTER IP ENABLED SERVICES, LLC 792K BELFAST TN
2018-06-04 223-800 0–9 XXXall 10 · 2 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 HARISBGZN1 PA
2018-06-04 228-260 0–9 XXXall 10 · 3 holders which blocks → VONAGE AMERICA LLC 197D BILOXI MS
2018-06-04 267-842 0–9 XXXwhole prefix which blocks → CORE COMMUNICATIONS, INC. - PA 3806 DOYLESTOWN PA
2018-06-04 302-639 0–9 XXXall 10 · 3 holders which blocks → CORETEL DELAWARE, INC. - DE 1991 NEW CASTLE DE
2018-06-04 319-289 0–9 XXXall 10 · 6 holders which blocks → VONAGE AMERICA LLC 197D CEDAR RPDS IA
2018-06-04 470-989 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA NE GA
2018-06-04 551-270 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 RAMSEY NJ
2018-06-04 581-778 not yet reported which blocks → Distributel 083E Charny —
2018-06-04 581-779 not yet reported which blocks → Distributel 083E St-Nicolas —
2018-06-04 667-243 0–9 XXXall 10 · 2 holders which blocks → CORE COMMUNICATIONS, INC.- MD 2593 OXFORD MD
2018-06-04 667-345 0–9 XXXall 10 · 5 holders which blocks → CORE COMMUNICATIONS, INC.- MD 2593 CATONSVL MD
2018-06-04 667-364 0–9 XXXall 10 · 3 holders which blocks → CORE COMMUNICATIONS, INC.- MD 2593 STEVENSVL MD
2018-06-04 667-866 0–9 XXXall 10 · 3 holders which blocks → CORE COMMUNICATIONS, INC.- MD 2593 DARLINGTON MD
2018-06-04 782-985 not yet reported which blocks → Distributel 081E Upper Musquodoboit —
2018-06-04 782-986 not yet reported which blocks → Distributel 081E Upper Stewiacke —
2018-06-04 782-987 not yet reported which blocks → Distributel 081E Wallace —
2018-06-04 782-988 not yet reported which blocks → Distributel 081E Walton —
2018-06-04 782-989 not yet reported which blocks → Distributel 081E Waverley —
2018-06-04 782-990 not yet reported which blocks → Distributel 081E Wentworth —
2018-06-04 782-991 not yet reported which blocks → Distributel 081E Windsor —
2018-06-04 873-412 not yet reported which blocks → Distributel 083E Aylmer —
2018-06-04 873-413 not yet reported which blocks → Distributel 083E Buckingham —
2018-06-04 873-415 not yet reported which blocks → Distributel 083E Chelsea —
2018-06-04 873-425 not yet reported which blocks → Distributel 083E Bouchette —
2018-06-04 873-426 not yet reported which blocks → Distributel 083E Chapeau —
2018-06-04 873-433 not yet reported which blocks → Distributel 083E L'Avenir —
2018-06-04 873-434 not yet reported which blocks → Distributel 083E St-Germain-de-Grantham —
2018-06-04 873-435 not yet reported which blocks → Distributel 083E St-Guillaume —
2018-06-04 873-436 not yet reported which blocks → Distributel 083E Wickham —
2018-06-03 606-641 none assigned yet which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 ALBANY KY
2018-06-01 240-639 0–9 XXXall 10 · 4 holders which blocks → CORE COMMUNICATIONS, INC.- MD 2593 LAUREL236 MD
2018-06-01 386-241 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D DAYTONABCH FL
2018-06-01 480-881 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2018-06-01 571-387 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HERNDON VA

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.