NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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. 38
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
2001-10-18 646-269 not yet reported which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN01 NY
2001-10-18 646-338 not yet reported which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN01 NY
2001-10-18 646-339 not yet reported which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN01 NY
2001-10-18 647-226 not yet reported which blocks → Bell Mobility 6574 Toronto —
2001-10-18 650-438 7XXX8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SSNFRNCSCO CA
2001-10-18 707-217 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ROSA CA
2001-10-18 707-218 2XXX3XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CRESCENTCY CA
2001-10-18 707-712 5XXX6XXX7XXX8XXX9XXX which blocks → METROPCS, INC. 5562 VALLEJO CA
2001-10-18 712-928 not yet reported which blocks → COMMUNITY CABLE TV AGCY O'BRIEN CO. DBA COMM.-IA 3112 HARTLEY IA
2001-10-18 712-949 not yet reported which blocks → COMMUNITY CABLE TV AGCY O'BRIEN CO. DBA COMM.-IA 3112 PAULLINA IA
2001-10-18 712-957 not yet reported which blocks → COMMUNITY CABLE TV AGCY O'BRIEN CO. DBA COMM.-IA 3112 PRIMGHAR IA
2001-10-18 720-327 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DENVER CO
2001-10-18 720-329 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DENVER CO
2001-10-18 720-404 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DENVER CO
2001-10-18 760-660 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → METROPCS NETWORKS, LLC 899D DSERTHTSPG CA
2001-10-18 760-672 not yet reported which blocks → T-MOBILE USA, INC. 6529 OCSD OCSD CA
2001-10-18 760-808 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PALM SPG CA
2001-10-18 805-618 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SANBARBARA CA
2001-10-18 805-637 not yet reported which blocks → T-MOBILE USA, INC. 6529 SANBARBARA CA
2001-10-18 810-512 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → 123.NET, LLC 2550 ALGONAC MI
2001-10-18 810-623 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 BRIGHTON MI
2001-10-18 810-669 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E CAPAC MI
2001-10-18 810-886 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 BROWN CITY MI
2001-10-18 818-355 none assigned yet which blocks → T-MOBILE USA, INC. 6529 BRBN BRBN CA
2001-10-18 832-566 0XXX3XXX4XXX5XXX7XXX8XXX which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
2001-10-18 848-250 none assigned yet which blocks → METROPCS, INC. 5562 WOODBRIDGE NJ
2001-10-18 848-299 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NJ 7142 LAKEWOOD NJ
2001-10-18 848-525 0XXX2XXX3XXX4XXX5XXX6XXX7XXX which blocks → METROPCS, INC. 5562 LAKEWOOD NJ
2001-10-18 858-248 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 POWAY CA
2001-10-18 862-377 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → METROPCS, INC. 5562 POMPTONLKS NJ
2001-10-18 862-579 0XXX2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 MORRISTOWN NJ
2001-10-18 916-595 not yet reported which blocks → T-MOBILE USA, INC. 6529 SCRM NORTH CA
2001-10-18 916-743 not yet reported which blocks → T-MOBILE USA, INC. 6529 SCRM MAIN CA
2001-10-18 918-906 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TULSA OK
2001-10-18 925-207 none assigned yet which blocks → METROPCS, INC. 5562 CONCORD CA
2001-10-18 925-639 not yet reported which blocks → T-MOBILE USA, INC. 6529 WALNUT CRK CA
2001-10-18 939-389 8XXX9XXX which blocks → LIBERTY MOBILE PUERTO RICO INC. 639J SANTURCE PR
2001-10-18 951-757 none assigned yet which blocks → T-MOBILE USA, INC. 6529 TEMECULA CA
2001-10-18 989-712 1XXX2XXX3XXX4XXX5XXX8XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HARBOR BCH MI
2001-10-18 989-827 0XXX2XXX3XXX4XXX7XXX8XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KINGSTON MI
2001-10-18 989-917 2XXX6XXX7XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MINDENCITY MI
2001-10-17 403-891 not yet reported which blocks → Fido Solutions Inc. 5643 Calgary —
2001-10-17 407-268 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 SANFORD FL
2001-10-17 443-752 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BEL AIR MD
2001-10-17 443-904 7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2001-10-17 520-834 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TUCSON AZ
2001-10-17 551-587 4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 HACKENSACK NJ
2001-10-17 551-998 2XXX3XXX which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 JERSEYCITY NJ
2001-10-17 603-370 2XXX3XXX4XXX5XXX6XXX · 3 holders which blocks → BELL ATLANTIC MOBILE, INC 6386 CANDIA NH
2001-10-17 603-401 2XXX3XXX5XXX6XXX which blocks → BELL ATLANTIC MOBILE, INC 6386 SALEM NH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.