NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

355 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
ONVOY, LLC - CA 31
NEW CINGULAR WIRELESS PCS, LLC - IL 28
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
2002-08-28 252-567 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → UNITED STATES CELLULAR - NC 6282 ROCKYMOUNT NC
2002-08-28 256-369 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AL 5255 SYLACAUGA AL
2002-08-28 256-474 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AL 5255 TALLADEGA AL
2002-08-28 262-389 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MILWAUKZN2 WI
2002-08-28 336-425 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LEXINGTON NC
2002-08-28 339-440 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LYNN MA
2002-08-28 479-847 1XXX2XXX3XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 PARIS AR
2002-08-28 479-849 1XXX2XXX3XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 BOONEVILLE AR
2002-08-28 586-648 0–9 XXXall 10 · 9 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 NEWBALTIMR MI
2002-08-28 608-469 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
2002-08-28 608-577 none assigned yet which blocks → UNITED STATES CELLULAR - WI 6274 MADISON WI
2002-08-28 662-582 5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 KOSCIUSKO MS
2002-08-28 701-212 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - ND 8054 FARGO ND
2002-08-28 701-213 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - ND 8054 GRANDFORKS ND
2002-08-28 701-214 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - ND 8054 BISMARCK ND
2002-08-28 705-223 not yet reported which blocks → ExaTEL Inc. 3147 North Bay —
2002-08-28 774-270 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NATICK MA
2002-08-28 774-271 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 ROCHESTER MA
2002-08-28 802-558 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VT 6390 RUTLAND VT
2002-08-28 810-986 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BRIGHTON MI
2002-08-28 832-842 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 HOUSTON TX
2002-08-28 902-444 not yet reported which blocks → Bragg Communications Inc. 4878 Halifax —
2002-08-28 910-378 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 JACKSONVL NC
2002-08-28 928-862 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 SEDONA AZ
2002-08-28 928-863 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 FLAGSTAFF AZ
2002-08-28 970-475 4XXX6XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J GREELEY CO
2002-08-28 970-492 5XXX8XXX · 2 holders which blocks → QWEST CORPORATION 9636 FT COLLINS CO
2002-08-28 978-844 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 ACTON MA
2002-08-28 978-855 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 FITCHBURG MA
2002-08-28 978-866 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LOWELL MA
2002-08-28 989-627 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OWOSSO MI
2002-08-27 208-596 3XXX4XXX7XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MOSCOW ID
2002-08-27 208-597 2XXX3XXX4XXX5XXX7XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SANDPOINT ID
2002-08-27 231-440 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → 123.NET, LLC 2550 BALDWIN MI
2002-08-27 231-441 not yet reported which blocks → 123.NET, LLC 2550 FIFE LAKE MI
2002-08-27 231-488 not yet reported which blocks → 123.NET, LLC 2550 MANISTEE MI
2002-08-27 231-520 not yet reported which blocks → 123.NET, LLC 2550 CHARLEVOIX MI
2002-08-27 231-538 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → 123.NET, LLC 2550 FREMONT MI
2002-08-27 231-583 none assigned yet which blocks → 123.NET, LLC 2550 LUDINGTON MI
2002-08-27 231-635 not yet reported which blocks → 123.NET, LLC 2550 MACKINAWCY MI
2002-08-27 231-639 not yet reported which blocks → 123.NET, LLC 2550 BEULAH MI
2002-08-27 231-643 1XXX2XXX3XXX4XXX6XXX which blocks → 123.NET, LLC 2550 MORLEY MI
2002-08-27 231-656 not yet reported which blocks → 123.NET, LLC 2550 KALKASKA MI
2002-08-27 231-660 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → 123.NET, LLC 2550 BIG RAPIDS MI
2002-08-27 231-686 not yet reported which blocks → 123.NET, LLC 2550 FRANKFORT MI
2002-08-27 231-721 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → 123.NET, LLC 2550 HART MI
2002-08-27 231-776 not yet reported which blocks → 123.NET, LLC 2550 PETOSKEY MI
2002-08-27 231-778 not yet reported which blocks → 123.NET, LLC 2550 TRAVERSECY MI
2002-08-27 231-782 not yet reported which blocks → 123.NET, LLC 2550 CHEBOYGAN MI
2002-08-27 231-792 not yet reported which blocks → 123.NET, LLC 2550 MANCELONA MI

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.