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
2013-11-08 251-241-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL 7221 BREWTON AL
2013-11-08 251-303-0XXX 0000–0999Assigned ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 MOBILE AL
2013-11-08 251-303-9XXX 9000–9999Assigned ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 MOBILE AL
2013-10-23 251-260-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MELVIN AL
2013-10-16 251-262-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL 7221 JACKSON AL
2013-09-24 251-301-2XXX 2000–2999Assigned METROPCS, INC. 5562 MOBILE AL
2013-09-24 251-301-3XXX 3000–3999Assigned METROPCS, INC. 5562 MOBILE AL
2013-09-24 251-301-4XXX 4000–4999Assigned METROPCS, INC. 5562 MOBILE AL
2013-09-06 251-652-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2013-06-27 251-241-2XXX 2000–2999Assigned TELEPAK NETWORKS, INC. - AL 947G BREWTON AL
2013-06-26 251-262-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 JACKSON AL
2013-06-26 251-317-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 CITRONELLE AL
2013-06-26 251-973-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 BELLEFONTN AL
2013-06-19 251-234-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 MOBILE AL
2013-06-12 251-202-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 BAYMINETTE AL
2013-05-14 251-236-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F BREWTON AL
2013-05-08 251-241-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AL 8271 BREWTON AL
2013-05-06 251-265-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F MT VERNON AL
2013-05-06 251-494-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F BAYMINETTE AL
2013-04-16 251-408-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C MOBILE AL
2013-04-12 251-299-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL 7221 MT VERNON AL
2013-04-05 251-210-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F FAIRHOPE AL
2013-02-07 251-303-1XXX 1000–1999Assigned NUSO, LLC 551G MOBILE AL
2013-02-04 251-219-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F MOBILE AL
2013-02-04 251-234-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F MOBILE AL
2013-01-25 251-321-4XXX 4000–4999Assigned ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 ATMORE AL
2013-01-25 251-321-5XXX 5000–5999Assigned ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 ATMORE AL
2013-01-24 251-265-0XXX 0000–0999Assigned AT&T ENTERPRISES, LLC 516C MT VERNON AL
2013-01-15 251-236-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 BREWTON AL
2013-01-10 251-210-6XXX 6000–6999Assigned MCC TELEPHONY OF THE SOUTH, LLC - AL 773F FAIRHOPE AL
2012-12-18 251-206-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F MOBILE AL
2012-12-18 251-406-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL 7221 MOBILE AL
2012-12-18 251-460-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F MOBILE AL
2012-12-18 251-623-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F MOBILE AL
2012-11-29 251-369-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C EVERGREEN AL
2012-11-28 251-216-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F EVERGREEN AL
2012-11-28 251-616-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F CLEAR SPG AL
2012-11-28 251-732-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F FLOMATON AL
2012-11-26 251-380-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2012-11-26 251-461-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2012-11-14 251-206-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F MOBILE AL
2012-11-12 251-301-0XXX 0000–0999Assigned TELEPAK NETWORKS, INC. - AL 947G MOBILE AL
2012-10-29 251-459-6XXX 6000–6999Assigned TELEPAK NETWORKS, INC. - AL 947G MOBILE AL
2012-10-29 251-459-8XXX 8000–8999Assigned TELEPAK NETWORKS, INC. - AL 947G MOBILE AL
2012-08-31 251-225-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F MCINTOSH AL
2012-07-18 251-206-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F MOBILE AL
2012-07-18 251-267-7XXX 7000–7999Assigned MCC TELEPHONY OF THE SOUTH, LLC - AL 773F FRISCOCITY AL
2012-07-18 251-765-1XXX 1000–1999Assigned MCC TELEPHONY OF THE SOUTH, LLC - AL 773F EXCEL AL
2012-07-16 251-262-1XXX 1000–1999Assigned MCC TELEPHONY OF THE SOUTH, LLC - AL 773F JACKSON AL
2012-07-11 251-216-5XXX 5000–5999Assigned MCC TELEPHONY OF THE SOUTH, LLC - AL 773F EVERGREEN 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.