NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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 21
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
2021-11-23 873-773 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
2021-11-22 719-677 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F BUENAVISTA CO
2021-11-22 725-270 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NV 6458 LAS VEGAS NV
2021-11-22 779-340 0XXX1XXX2XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E COAL CITY IL
2021-11-22 860-699 0XXX1XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CT 199F LEDYARD CT
2021-11-22 910-906 0–9 XXXall 10 · 8 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E CASTLEHAYN NC
2021-11-22 928-400 0XXX4XXX · 2 holders which blocks → FRACTEL, LLC 965H WIKIEUP AZ
2021-11-22 951-606 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SUN CITY CA
2021-11-21 341-212 0–9 XXXall 10 · 3 holders which blocks → TELNYX LLC 073H OKLD BKLY CA
2021-11-21 831-842 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H APTOS CA
2021-11-19 262-276 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - WI 007F HARTFORD WI
2021-11-19 341-344 0–9 XXXall 10 · 3 holders which blocks → SONIC TELECOM, LLC - CA 433E OKLD TRNID CA
2021-11-19 346-527 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TX 903C KATY TX
2021-11-19 458-867 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H EUGENE OR
2021-11-19 470-901 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ATLANTA NE GA
2021-11-19 470-904 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ATLANTA SO GA
2021-11-19 470-905 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ATLANTA GA
2021-11-19 470-906 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H ATLANTA GA
2021-11-19 470-940 0–9 XXXall 10 · 2 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J WINDER GA
2021-11-19 639-381 not yet reported which blocks → Fibernetics Corporation 464D Indian Head —
2021-11-19 639-418 not yet reported which blocks → Fibernetics Corporation 464D Langham —
2021-11-19 681-276 0XXX1XXX2XXX3XXX5XXX6XXX7XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - WV 080F BUCKHANNON WV
2021-11-19 681-309 0XXX2XXX6XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - WV 080F GRAFTON WV
2021-11-19 914-535 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSCHSTZN03 NY
2021-11-18 213-645 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 10 CA
2021-11-18 251-376 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MOBILE AL
2021-11-18 256-948 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SCOTTSBORO AL
2021-11-18 262-304 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WI 225C CEDARBURG WI

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.