NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

337 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 25
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 12
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
2021-11-24 502-838 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - KY 8406 LOUISVILLE KY
2021-11-24 502-840 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - KY 8406 LOUISVILLE KY
2021-11-24 502-841 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - KY 8406 LOUISVILLE KY
2021-11-24 502-843 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - KY 8406 LOUISVILLE KY
2021-11-24 502-847 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - KY 8406 LOUISVILLE KY
2021-11-24 505-460 0–9 XXXall 10 · 6 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J ALBUQURQUE NM
2021-11-24 534-901 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H WAUSAU WI
2021-11-24 572-205 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F EDMOND OK
2021-11-24 716-571 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC- NY 384C HAMBURG NY
2021-11-24 717-280 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J HARISBGZN1 PA
2021-11-24 743-240 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → METROPCS, INC. 5562 STANLEYVL NC
2021-11-24 872-313 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC 224C CHICGOZN08 IL
2021-11-24 947-529 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H BIRMINGHAM MI
2021-11-24 980-364 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 INDIANTRAL NC
2021-11-24 986-216 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - ID 192F NAMPA ID
2021-11-23 216-492 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 CLEVELAND OH
2021-11-23 225-469 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 BATONROUGE LA
2021-11-23 249-556 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Cannington —
2021-11-23 249-633 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Little Britain —
2021-11-23 316-895 0–9 XXXall 10 · 7 holders which blocks → TWILIO INTERNATIONAL, INC. 506J WICHITA KS
2021-11-23 332-262 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC- NY 384C NWYRCYZN01 NY
2021-11-23 386-342 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 DEBARY FL
2021-11-23 458-280 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OR 3234 OAKLAND OR
2021-11-23 579-775 not yet reported which blocks → IXICA Communications Inc. 812H Pont-Viau —
2021-11-23 612-476 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 TWINCITIES MN
2021-11-23 612-778 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MN 184D TWINCITIES MN
2021-11-23 705-625 not yet reported which blocks → IXICA Communications Inc. 812H Barrie —
2021-11-23 873-773 not yet reported which blocks → IXICA Communications Inc. 812H St-Felix-de-Kingsey —
2021-11-23 931-356 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 MCMINNVL TN
2021-11-22 279-215 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E FOLSOM CA
2021-11-22 346-528 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MANVEL TX
2021-11-22 365-669 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Blackstock —
2021-11-22 413-462 0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K SANDISFLD MA
2021-11-22 442-385 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 SAN MARCOS CA
2021-11-22 442-895 0–9 XXXall 10 · 2 holders which blocks → TWILIO INTERNATIONAL, INC. 506J PALM SPG CA
2021-11-22 447-895 0XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TWILIO INTERNATIONAL, INC. 506J CHAMPAURBN IL
2021-11-22 515-384 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - IA 985E WINTERSET IA
2021-11-22 530-875 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → TWILIO INTERNATIONAL, INC. 506J CHICO CA
2021-11-22 531-282 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BEATRICE NE
2021-11-22 551-337 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 HACKENSACK NJ
2021-11-22 551-338 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 JERSEYCITY NJ
2021-11-22 564-900 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H MT VERNON WA
2021-11-22 567-463 0–9 XXXall 10 · 8 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ASHLAND OH
2021-11-22 574-901 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H LOGANSPORT IN
2021-11-22 575-283 0–9 XXXall 10 · 8 holders which blocks → BANDWIDTH.COM CLEC, LLC - NM 123F ANTHONY NM
2021-11-22 585-895 0–9 XXXall 10 · 5 holders which blocks → TWILIO INTERNATIONAL, INC. 506J ROCHESTER NY
2021-11-22 640-219 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LAWRENCEVL NJ
2021-11-22 657-518 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-11-22 667-371 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ELLICOTTCY MD
2021-11-22 712-962 7XXX which blocks → ONVOY, LLC - IA 221F MIDLAND IA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.