NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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. 39
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 20
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
2011-02-07 289-935 not yet reported which blocks → TELUS Mobility 8303 Georgetown —
2011-02-07 315-741 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 SYRACUSE NY
2011-02-07 334-645 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C MAPLESVL AL
2011-02-07 337-573 0–9 XXXall 10 · 7 holders which blocks → AT&T ENTERPRISES, LLC 516C YOUNGSVL LA
2011-02-07 636-775 0–9 XXXall 10 · 5 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K TROY MO
2011-02-07 709-323 not yet reported which blocks → Bell Mobility Aliant 329A Harbour Breton —
2011-02-07 709-324 not yet reported which blocks → Bell Mobility Aliant 329A St. Alban's —
2011-02-07 715-994 0XXX1XXX2XXX3XXX4XXX7XXX9XXX · 6 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K KESHENA WI
2011-02-04 202-999 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DC 6402 WSHNGTNZN1 DC
2011-02-04 417-812 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRINGFLD MO
2011-02-04 443-990 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MD 071F BALTIMORE MD
2011-02-04 661-402 0–9 XXXall 10 · 4 holders which blocks → METROPCS NETWORKS, LLC 899D PLDL AGDL CA
2011-02-04 662-642 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C MICHIGANCY MS
2011-02-04 779-235 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C CRESCENTCY IL
2011-02-03 571-535 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MANASSAS VA
2011-02-03 928-815 4XXX which blocks → NAVAJO COMM CO INC - AZ DBA FRONTIER NAVAJO COM 4449 WINDOWROCK AZ
2011-02-02 204-805 not yet reported which blocks → MTS Inc. 991B Winnipeg —
2011-02-02 204-894 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Winnipeg —
2011-02-02 226-787 not yet reported which blocks → Bell Mobility 6574 Windsor —
2011-02-02 226-821 not yet reported which blocks → Bell Mobility 6574 Guelph —
2011-02-02 425-623 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 BELLEVUE WA
2011-02-02 520-724 0–9 XXXall 10 · 2 holders which blocks → QWEST CORPORATION 9636 TUCSON AZ
2011-02-02 581-308 not yet reported which blocks → Bell Mobility 6574 Quebec —
2011-02-02 587-335 not yet reported which blocks → Bell Mobility 6574 Edmonton —
2011-02-02 587-436 not yet reported which blocks → Bell Mobility 6574 Calgary —
2011-02-02 587-926 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Edmonton —
2011-02-02 587-927 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Edmonton —
2011-02-02 587-929 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Edmonton —
2011-02-02 778-350 not yet reported which blocks → Bell Mobility 6574 Victoria —
2011-02-02 858-255 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 LA JOLLA CA
2011-02-02 938-223 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → AT&T ENTERPRISES, LLC 516C RED BAY AL
2011-02-02 938-238 0XXX1XXX2XXX3XXX4XXX5XXX7XXX · 3 holders which blocks → AT&T ENTERPRISES, LLC 516C GOODWATER AL
2011-02-02 979-276 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C GARWOOD TX
2011-02-01 202-800 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF THE DISTRICT OF COLUMBIA, DC 275F WSHNGTNZN1 DC
2011-02-01 305-900 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 KEYS FL
2011-02-01 318-568 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C DRY PRONG LA
2011-02-01 438-402 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Montreal —
2011-02-01 438-995 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Montreal —
2011-02-01 438-996 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Montreal —
2011-02-01 438-997 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Montreal —
2011-02-01 438-998 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Montreal —
2011-02-01 443-208 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-02-01 443-314 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-02-01 443-435 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-02-01 443-882 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-02-01 514-417 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Montreal —
2011-02-01 514-546 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Montreal —
2011-02-01 587-726 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Grande Prairie —
2011-02-01 702-359 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF NEVADA, LLC - NV 408F LAS VEGAS NV
2011-02-01 740-800 2XXX7XXX8XXX · 3 holders which blocks → AT&T ENTERPRISES, LLC 516C CARROLL OH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.