NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

11 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, last 30 days — NPA 251
NEW CINGULAR WIRELESS PCS, LLC - GA 6
ONVOY, LLC - AL 3
WIDE VOICE, LLC - AL 2
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 thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2019-09-10 251-306-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 IRNGTNSTEL AL
2019-08-07 251-254-8XXX 8000–8999Assigned ONVOY, LLC - AL 604E FLOMATON AL
2019-08-07 251-261-0XXX 0000–0999Assigned ONVOY, LLC - AL 604E MCCULLOUGH AL
2019-08-07 251-293-0XXX 0000–0999Assigned ONVOY, LLC - AL 604E BELLEFONTN AL
2019-08-07 251-351-1XXX 1000–1999Assigned ONVOY, LLC - AL 604E BEATRICE AL
2019-08-07 251-451-1XXX 1000–1999Assigned ONVOY, LLC - AL 604E GOSPORT AL
2019-08-07 251-551-1XXX 1000–1999Assigned ONVOY, LLC - AL 604E PINE APPLE AL
2019-08-07 251-572-0XXX 0000–0999Assigned ONVOY, LLC - AL 604E FRISCOCITY AL
2019-08-07 251-862-1XXX 1000–1999Assigned ONVOY, LLC - AL 604E URIAH AL
2019-08-07 251-873-9XXX 9000–9999Assigned ONVOY, LLC - AL 604E FOWL RIVER AL
2019-08-06 251-286-8XXX 8000–8999Assigned MCC TELEPHONY OF THE SOUTH, LLC - AL 773F BREWTON AL
2019-07-31 251-244-2XXX 2000–2999Assigned ONVOY, LLC - AL 604E PETERMAN AL
2019-07-31 251-322-2XXX 2000–2999Assigned ONVOY, LLC - AL 604E ATMORE AL
2019-07-25 251-651-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BAYMINETTE AL
2019-07-17 251-283-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 MOBILE AL
2019-07-16 251-283-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AL 8271 MOBILE AL
2019-07-10 251-215-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 FOLEY AL
2019-07-09 251-310-9XXX 9000–9999Assigned AT&T - LOCAL 7421 BELLEFONTN AL
2019-06-10 251-292-2XXX 2000–2999Assigned TELNYX LLC 073H MELVIN AL
2019-06-07 251-253-6XXX 6000–6999Assigned ONVOY, LLC - AL 604E ATMORE AL
2019-06-07 251-278-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 FAIRHOPE AL
2019-06-07 251-278-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 FAIRHOPE AL
2019-06-07 251-292-1XXX 1000–1999Assigned ONVOY, LLC - AL 604E MELVIN AL
2019-06-07 251-320-6XXX 6000–6999Assigned ONVOY, LLC - AL 604E JACKSON AL
2019-06-07 251-714-8XXX 8000–8999Assigned ONVOY, LLC - AL 604E FINCHBURG AL
2019-06-07 251-900-1XXX 1000–1999Assigned ONVOY, LLC - AL 604E EXCEL AL
2019-06-05 251-305-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2019-06-03 251-320-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F JACKSON AL
2019-06-03 251-320-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F JACKSON AL
2019-05-17 251-293-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BELLEFONTN AL
2019-05-09 251-299-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F MT VERNON AL
2019-05-06 251-283-2XXX 2000–2999Assigned ONVOY, LLC - AL 604E MOBILE AL
2019-05-06 251-283-3XXX 3000–3999Assigned ONVOY, LLC - AL 604E MOBILE AL
2019-05-06 251-283-4XXX 4000–4999Assigned ONVOY, LLC - AL 604E MOBILE AL
2019-05-06 251-283-5XXX 5000–5999Assigned ONVOY, LLC - AL 604E MOBILE AL
2019-05-03 251-309-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F BAYOUBATRE AL
2019-05-03 251-931-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F CLEAR SPG AL
2019-05-01 251-320-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F JACKSON AL
2019-05-01 251-320-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F JACKSON AL
2019-04-25 251-227-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F EVERGREEN AL
2019-04-25 251-290-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F GRAND BAY AL
2019-03-21 251-314-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F BREWTON AL
2019-03-14 251-237-9XXX 9000–9999Assigned ONVOY, LLC - AL 604E FLOMATON AL
2019-03-14 251-244-7XXX 7000–7999Assigned ONVOY, LLC - AL 604E PETERMAN AL
2019-03-14 251-244-9XXX 9000–9999Assigned ONVOY, LLC - AL 604E PETERMAN AL
2019-03-14 251-255-9XXX 9000–9999Assigned ONVOY, LLC - AL 604E EVERGREEN AL
2019-03-14 251-274-1XXX 1000–1999Assigned ONVOY, LLC - AL 604E MCINTOSH AL
2019-03-14 251-274-8XXX 8000–8999Assigned ONVOY, LLC - AL 604E MCINTOSH AL
2019-03-14 251-276-4XXX 4000–4999Assigned ONVOY, LLC - AL 604E COFFEEVL AL
2019-03-14 251-276-5XXX 5000–5999Assigned ONVOY, LLC - AL 604E COFFEEVL AL

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.