NumberResearch Membership · Data 09/28/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/28/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 19
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
2020-07-30 321-342 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H EAU GALLIE FL
2020-07-30 334-751 0XXX1XXX2XXX3XXX4XXX6XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 FT DEPOSIT AL
2020-07-30 431-932 not yet reported which blocks → Fibernetics Corporation 464D Winnipeg —
2020-07-30 469-861 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MCKINNEY TX
2020-07-30 470-703 0–9 XXXall 10 · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K GAINESVL GA
2020-07-30 639-210 not yet reported which blocks → SaskTel Mobility 9868 Prince Albert —
2020-07-30 639-218 not yet reported which blocks → SaskTel Mobility 9868 North Battleford —
2020-07-30 639-250 not yet reported which blocks → SaskTel Mobility 9868 Lloydminster —
2020-07-30 639-305 not yet reported which blocks → SaskTel Mobility 9868 Swift Current —
2020-07-30 657-448 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-07-30 657-460 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2020-07-30 667-284 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MD 6119 BALTIMORE MD
2020-07-30 672-882 not yet reported which blocks → Fibernetics Corporation 464D Gulf Islands —
2020-07-30 672-883 not yet reported which blocks → Fibernetics Corporation 464D Saanich —
2020-07-30 672-884 not yet reported which blocks → Fibernetics Corporation 464D Sooke —
2020-07-30 682-329 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GLENDALE TX
2020-07-30 782-382 not yet reported which blocks → Fibernetics Corporation 464D Halifax —
2020-07-30 786-946 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H MIAMI FL
2020-07-30 816-648 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 KANSASCITY MO
2020-07-30 848-295 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 METUCHEN NJ
2020-07-30 913-388 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 GARDNER KS
2020-07-30 936-299 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LUFKIN TX
2020-07-29 302-688 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H WILMINGTON DE
2020-07-29 302-866 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H MILFORD DE
2020-07-29 302-899 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H CAMDEN DE
2020-07-29 307-355 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LA GRANGE WY
2020-07-29 334-686 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DOTHAN AL
2020-07-29 479-392 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FORT SMITH AR
2020-07-29 551-271 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 BAYONNE NJ
2020-07-29 719-507 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 PUEBLO CO
2020-07-29 725-899 6XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H COYOTE SPG NV
2020-07-29 725-933 3XXX9XXX · 2 holders which blocks → FRACTEL, LLC 965H SPIRIT MT NV
2020-07-29 959-977 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H WINSTED CT
2020-07-29 970-694 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 FT COLLINS CO
2020-07-28 309-773 1XXX2XXX3XXX7XXX · 3 holders which blocks → STRATUS NETWORKS 495J HAMPTON IL
2020-07-28 312-530 0–9 XXXall 10 · 5 holders which blocks → STRATUS NETWORKS 495J CHICGOZN01 IL
2020-07-28 326-234 0XXX1XXX5XXX · 3 holders which blocks → FRACTEL, LLC 965H BYHALIA OH
2020-07-28 326-345 0XXX1XXX2XXX5XXX6XXX · 5 holders which blocks → FRACTEL, LLC 965H DE GRAFF OH
2020-07-28 326-465 0XXX1XXX2XXX4XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H RIDGEWAY OH
2020-07-28 346-428 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 478J HOUSTON TX
2020-07-28 385-307 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 PROVO UT
2020-07-28 385-356 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H AMERCNFORK UT
2020-07-28 385-688 0XXX6XXX8XXX · 3 holders which blocks → FRACTEL, LLC 965H GOSHEN UT
2020-07-28 385-758 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H CLEARFIELD UT
2020-07-28 385-842 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H KAYSVILLE UT
2020-07-28 385-855 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H MIDVALE UT
2020-07-28 385-946 0XXX3XXX · 2 holders which blocks → FRACTEL, LLC 965H EAGLE MTN UT
2020-07-28 412-679 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PTTSBGZON7 PA
2020-07-28 458-356 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H EUGENE OR
2020-07-28 458-529 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H PHOENIX OR

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/28/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.