NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

334 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 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
2020-08-24 984-257 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E CREEDMOOR NC
2020-08-21 209-692 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SNRA MAIN CA
2020-08-21 239-341 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D CAPE CORAL FL
2020-08-21 256-807 0XXX1XXX2XXX3XXX5XXX6XXX7XXX · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 HEFLIN AL
2020-08-21 256-809 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 HUNTSVILLE AL
2020-08-21 365-935 not yet reported which blocks → TekSavvy Solutions Inc 548H St. Catharines-Thorold —
2020-08-21 365-948 not yet reported which blocks → TekSavvy Solutions Inc 548H Selkirk —
2020-08-21 365-949 not yet reported which blocks → TekSavvy Solutions Inc 548H Stevensville —
2020-08-21 365-951 not yet reported which blocks → TekSavvy Solutions Inc 548H Vineland —
2020-08-21 365-952 not yet reported which blocks → TekSavvy Solutions Inc 548H Wainfleet —
2020-08-21 365-953 not yet reported which blocks → TekSavvy Solutions Inc 548H Welland —
2020-08-21 365-954 not yet reported which blocks → TekSavvy Solutions Inc 548H Wellandport —
2020-08-21 431-322 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Portage La Prairie —
2020-08-21 431-332 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Portage La Prairie —
2020-08-21 431-622 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Portage La Prairie —
2020-08-21 431-922 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Portage La Prairie —
2020-08-21 601-915 0XXX1XXX2XXX3XXX6XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - MS 992E WAYNESBORO MS
2020-08-21 657-452 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E BUENA PARK CA
2020-08-21 765-466 0XXX3XXX6XXX · 3 holders which blocks → BHN IP ENABLED SERVICES, LLC 045L SWEETSER IN
2020-08-21 813-595 0–9 XXXall 10 · 2 holders which blocks → VONAGE AMERICA LLC 197D TAMPAEST FL
2020-08-21 839-895 0–9 XXXall 10 · 4 holders which blocks → TWILIO INTERNATIONAL, INC. 506J COLUMBIA SC
2020-08-21 845-854 8XXX which blocks → TWILIO INTERNATIONAL, INC. 506J POUGHKEPSI NY
2020-08-21 864-413 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 6398 GREENWOOD SC
2020-08-21 909-845 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CALIMESA CA
2020-08-21 930-345 0XXX1XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → FRACTEL, LLC 965H BIRDSEYE IN
2020-08-21 951-546 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TEMSCL CNY CA
2020-08-20 206-590 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - WA 006F SEATTLE WA
2020-08-20 229-266 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 VALDOSTA GA
2020-08-20 262-300 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H KENOSHA WI
2020-08-20 262-810 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 THIENSVL WI
2020-08-20 325-345 0XXX1XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H BAIRD TX
2020-08-20 365-936 not yet reported which blocks → TekSavvy Solutions Inc 548H Beamsville —
2020-08-20 365-937 not yet reported which blocks → TekSavvy Solutions Inc 548H Cayuga —
2020-08-20 365-938 not yet reported which blocks → TekSavvy Solutions Inc 548H Dunnville —
2020-08-20 365-939 not yet reported which blocks → TekSavvy Solutions Inc 548H Fisherville —
2020-08-20 365-940 not yet reported which blocks → TekSavvy Solutions Inc 548H Fort Erie —
2020-08-20 365-941 not yet reported which blocks → TekSavvy Solutions Inc 548H Niagara Falls —
2020-08-20 365-943 not yet reported which blocks → TekSavvy Solutions Inc 548H Niagara-On-The-Lake —
2020-08-20 365-944 not yet reported which blocks → TekSavvy Solutions Inc 548H Pelham —
2020-08-20 365-945 not yet reported which blocks → TekSavvy Solutions Inc 548H Port Colborne —
2020-08-20 365-946 not yet reported which blocks → TekSavvy Solutions Inc 548H Port Robinson —
2020-08-20 365-947 not yet reported which blocks → TekSavvy Solutions Inc 548H Ridgeway —
2020-08-20 386-348 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H FLAGLERBCH FL
2020-08-20 386-678 1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H LIVE OAK FL
2020-08-20 414-812 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 MILWAUKZN1 WI
2020-08-20 534-600 0XXX1XXX4XXX6XXX7XXX · 3 holders which blocks → FRACTEL, LLC 965H THREELAKES WI
2020-08-20 534-900 0XXX1XXX2XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H PICKEREL WI
2020-08-20 561-527 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 BOCA RATON FL
2020-08-20 602-731 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 PHOENIX AZ
2020-08-20 616-766 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H BELDING MI

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.