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
2002-05-02 772-590 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 STUART FL
2002-05-02 786-455 not yet reported which blocks → FUSION CLOUD SERVICES, LLC 206A NORTH DADE FL
2002-05-02 786-456 not yet reported which blocks → FUSION CLOUD SERVICES, LLC 206A MIAMI FL
2002-05-02 817-655 0XXX1XXX2XXX3XXX4XXX5XXX which blocks → SOUTHWESTERN BELL 9533 FORT WORTH TX
2002-05-02 931-361 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TN 4806 WINCHESTER TN
2002-05-02 970-455 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DILLON CO
2002-05-02 970-456 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CO 6118 GLENWD SPG CO
2002-05-02 970-457 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CO 6118 STEAMBOSPG CO
2002-05-02 970-458 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CO 6118 STERLING CO
2002-05-02 970-459 0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DURANGO CO
2002-05-02 971-241 4XXX5XXX6XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 MCMINNVL OR
2002-05-01 204-770 not yet reported which blocks → MTS Inc. 991B Winnipeg —
2002-05-01 252-577 not yet reported which blocks → PAETEC ITEL, LLC 829J NEW BERN NC
2002-05-01 414-574 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 MILWAUKZN5 WI
2002-05-01 440-251 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 PAINESVL OH
2002-05-01 479-586 1XXX2XXX3XXX4XXX5XXX7XXX8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROGERS AR
2002-05-01 514-779 not yet reported which blocks → Bell Mobility 6574 Montreal —
2002-05-01 575-635 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NM 5470 LAS CRUCES NM
2002-05-01 580-686 0XXX1XXX6XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 KONAWA OK
2002-05-01 580-752 0XXX1XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 HOBART OK
2002-05-01 580-798 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 ARDMORE OK
2002-05-01 580-872 2XXX3XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 MADILL OK
2002-05-01 585-702 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 XXXXXXXXXX NY
2002-05-01 615-653 4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 MURFREESBO TN
2002-05-01 774-263 none assigned yet which blocks → METROPCS, INC. 5562 ROCHESTER MA
2002-05-01 819-661 not yet reported which blocks → Bell Mobility 6574 Ottawa-Hull —
2002-04-30 219-306 1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 CROWNPOINT IN
2002-04-30 219-608 2XXX3XXX · 2 holders which blocks → METROPCS, INC. 5562 LA PORTE IN
2002-04-30 224-627 none assigned yet which blocks → T-MOBILE USA, INC. 6529 WAUKEGAN IL
2002-04-30 260-504 0XXX1XXX2XXX3XXX4XXX5XXX8XXX · 6 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 HUNTINGTON IN
2002-04-30 260-570 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 AUBURN IN
2002-04-30 260-905 1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 6 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ANGOLA IN
2002-04-30 260-906 0XXX1XXX2XXX5XXX8XXX9XXX · 2 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WABASH IN
2002-04-30 262-758 5XXX6XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 BURLINGTON WI
2002-04-30 270-215 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 OWENSBORO KY
2002-04-30 270-282 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 BOWLNGGREN KY
2002-04-30 270-908 0XXX1XXX2XXX3XXX5XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 PADUCAH KY
2002-04-30 330-303 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ELIVERPOOL OH
2002-04-30 330-423 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 YOUNGSTOWN OH
2002-04-30 330-984 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 WARREN OH
2002-04-30 352-502 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 OCALA FL
2002-04-30 352-503 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 INVERNESS FL
2002-04-30 352-504 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 LEESBURG FL
2002-04-30 352-505 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 GAINESVL FL
2002-04-30 352-507 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 CHIEFLAND FL
2002-04-30 360-229 2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SHELTON WA
2002-04-30 360-367 2XXX3XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ENUMCLAW WA
2002-04-30 386-868 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 DAYTONABCH FL
2002-04-30 423-973 0XXX1XXX2XXX3XXX5XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TN 4806 SNEEDVILLE TN
2002-04-30 502-294 1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → POWERTEL KENTUCKY LICENSES, INC. 365C BARDSTOWN KY

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.