NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

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
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 15
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
2004-10-13 630-618 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 AURORA IL
2004-10-13 631-771 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 E HAMPTON NY
2004-10-13 773-494 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-10-13 773-512 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-10-13 778-231 not yet reported which blocks → Bell Mobility 6574 Vancouver —
2004-10-13 806-994 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 TULIA TX
2004-10-13 905-865 not yet reported which blocks → Bell Mobility 6574 Hamilton —
2004-10-13 905-981 not yet reported which blocks → TELUS Mobility 8303 Hamilton —
2004-10-12 239-533 0–9 XXXwhole prefix which blocks → CENTURYLINK OF FLORIDA, INC. (UNITED) 0341 FORT MYERS FL
2004-10-12 250-857 not yet reported which blocks → Bell Mobility 6574 Victoria —
2004-10-12 403-921 not yet reported which blocks → Bell Mobility 6574 Calgary —
2004-10-12 765-848 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J GREENCASTL IN
2004-10-12 778-230 not yet reported which blocks → Bell Mobility 6574 Vancouver —
2004-10-12 780-239 not yet reported which blocks → Bell Mobility 6574 Edmonton —
2004-10-12 905-207 not yet reported which blocks → TELUS Mobility 8303 Cobourg —
2004-10-11 239-207 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 NAPLES FL
2004-10-11 304-413 0–9 XXXall 10 · 4 holders which blocks → DIGITAL CONNECTIONS, INC. - WV 5201 MORGANTOWN WV
2004-10-11 479-258 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 BENTONVL AR
2004-10-11 561-234 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 WPALMBEACH FL
2004-10-11 630-405 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 AURORA IL
2004-10-11 631-714 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 PATCHOGUE NY
2004-10-11 775-277 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NV 6458 TONOPAH NV
2004-10-11 785-302 2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KS 6532 PHILLIPSBG KS
2004-10-11 903-808 4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 KILGORE TX
2004-10-11 904-252 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 JACKSONVL FL
2004-10-11 906-828 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → 123.NET, LLC 2550 IRON MT MI
2004-10-08 940-456 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GRAHAM TX
2004-10-07 402-260 0–9 XXXall 10 · 7 holders which blocks → UNITED STATES CELLULAR - NE 6263 WEST POINT NE
2004-10-07 514-717 not yet reported which blocks → Bell Mobility 6574 Montreal —
2004-10-07 605-240 0XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SALEM SD
2004-10-07 613-884 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Ottawa-Hull —
2004-10-07 713-889 not yet reported which blocks → SOUTHWESTERN BELL 9533 HOUSTON TX
2004-10-06 850-375 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 PENSACOLA FL
2004-10-06 907-632 not yet reported which blocks → GCI COMMUNICATION CORP. DBA GENERAL COMMUNICATION 6872 ANCHORAGE AK
2004-10-06 989-443 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 SAGINAW MI
2004-10-05 208-469 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MCCALL ID
2004-10-05 231-404 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 STANWOOD MI
2004-10-05 301-302 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 HAGERSTOWN MD
2004-10-05 306-977 not yet reported which blocks → SaskTel 8091 Saskatoon —
2004-10-05 313-459 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 DETROITZN1 MI
2004-10-05 347-374 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN07 NY
2004-10-05 347-684 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN08 NY
2004-10-05 347-715 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN06 NY
2004-10-05 410-800 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2004-10-05 603-833 0–9 XXXall 10 · 2 holders which blocks → BELL ATLANTIC MOBILE, INC 6386 ROCHESTER NH
2004-10-05 616-322 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRAND RPDS MI
2004-10-05 705-557 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Kapuskasing —
2004-10-05 705-886 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Fenelon Falls —
2004-10-05 705-888 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Collingwood —
2004-10-05 819-860 not yet reported which blocks → Bell Mobility 6574 Val-D'Or —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.