NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

337 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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 25
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 12
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
2013-06-10 848-575 0–9 XXXwhole prefix which blocks → VERIZON NEW JERSEY, INC. 9206 DUNELLEN NJ
2013-06-10 858-223 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C SNDG LVTA CA
2013-06-07 204-581 not yet reported which blocks → LES.NET (1996) Inc. 141F Brandon —
2013-06-07 208-502 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - ID 192F COTTONWOOD ID
2013-06-07 224-801 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J PALATINE IL
2013-06-07 224-802 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J DUNDEE IL
2013-06-07 236-430 not yet reported which blocks → TELUS 8086 Nelson —
2013-06-07 236-431 not yet reported which blocks → TELUS 8086 Salmon Arm —
2013-06-07 236-432 not yet reported which blocks → TELUS 8086 Terrace —
2013-06-07 236-433 not yet reported which blocks → TELUS 8086 Williams Lake —
2013-06-07 321-802 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J MELBOURNE FL
2013-06-07 352-877 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J OCALA FL
2013-06-07 402-409 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - NE 995E SYRACUSE NE
2013-06-07 404-640 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2013-06-07 469-801 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J DALLAS TX
2013-06-07 480-725 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2013-06-07 518-667 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 HARTFORD NY
2013-06-07 581-927 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Quebec —
2013-06-07 581-928 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Quebec —
2013-06-07 646-762 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NWYRCYZN01 NY
2013-06-07 708-627 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J MONEE IL
2013-06-07 720-965 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 DENVER CO
2013-06-07 813-804 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J TAMPACEN FL
2013-06-07 902-339 not yet reported which blocks → Bragg Communications Inc. 4878 Covehead —
2013-06-07 971-802 0–9 XXXall 10 · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J SHERIDAN OR
2013-06-06 440-805 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 ROCK CREEK OH
2013-06-06 469-802 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J DALLAS TX
2013-06-06 513-495 0–9 XXXwhole prefix which blocks → CINCINNATI BELL 9348 CLERMONT OH
2013-06-06 740-916 5XXX7XXX8XXX · 3 holders which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 FAIRVIEW OH
2013-06-06 813-808 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 TAMPAEST FL
2013-06-06 818-697 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E RESEDA CA
2013-06-05 740-785 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K LANCASTER OH
2013-06-04 219-802 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J HAMMOND IN
2013-06-04 219-804 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J E CHICAGO IN
2013-06-04 224-813 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J DEERFIELD IL
2013-06-04 431-234 not yet reported which blocks → MTS Inc. 991B Killarney —
2013-06-04 431-235 not yet reported which blocks → MTS Inc. 991B Hamiota —
2013-06-04 431-236 not yet reported which blocks → MTS Inc. 991B Deloraine —
2013-06-04 506-996 not yet reported which blocks → Fido Solutions Inc. 8820 Edmundston —
2013-06-04 587-613 not yet reported which blocks → TELUS 8084 Brooks —
2013-06-04 587-614 not yet reported which blocks → TELUS 8084 Camrose —
2013-06-04 587-615 not yet reported which blocks → TELUS 8084 Edson —
2013-06-04 587-616 not yet reported which blocks → TELUS 8084 Vegreville —
2013-06-04 701-418 not yet reported which blocks → SRT COMMUNICATIONS, INC. 3303 MINOT ND
2013-06-04 712-422 0XXX1XXX2XXX3XXX4XXX5XXX7XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 HAWARDEN IA
2013-06-04 832-929 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
2013-06-04 832-973 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
2013-06-04 980-834 0–9 XXXwhole prefix which blocks → WINDSTREAM COMMUNICATIONS, INC. - NC 7970 GASTONIA NC
2013-06-03 234-801 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K NEWPHLDLPH OH
2013-06-03 234-802 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MEDINA OH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.