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
2017-08-24 251-355-1XXX 1000–1999Assigned ONVOY, LLC - AL 604E MOBILE AL
2017-08-24 251-355-2XXX 2000–2999Assigned ONVOY, LLC - AL 604E MOBILE AL
2017-08-24 251-355-3XXX 3000–3999Assigned ONVOY, LLC - AL 604E MOBILE AL
2017-08-24 251-355-4XXX 4000–4999Assigned ONVOY, LLC - AL 604E MOBILE AL
2017-07-17 251-260-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F MELVIN AL
2017-07-11 251-264-2XXX 2000–2999Assigned MCC TELEPHONY OF THE SOUTH, LLC - AL 773F MOBILE AL
2017-06-23 251-250-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BAYMINETTE AL
2017-06-23 251-250-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BAYMINETTE AL
2017-06-15 251-276-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F COFFEEVL AL
2017-06-07 251-250-4XXX 4000–4999Assigned ONVOY, LLC - AL 604E BAYMINETTE AL
2017-06-07 251-930-6XXX 6000–6999Assigned ONVOY, LLC - AL 604E MOBILE AL
2017-05-31 251-213-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 FOLEY AL
2017-05-31 251-215-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 FOLEY AL
2017-05-22 251-278-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 FAIRHOPE AL
2017-05-18 251-266-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AL 8271 MOBILE AL
2017-05-18 251-270-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 FAIRHOPE AL
2017-05-03 251-250-2XXX 2000–2999Assigned ONVOY, LLC - AL 604E BAYMINETTE AL
2017-05-03 251-250-3XXX 3000–3999Assigned ONVOY, LLC - AL 604E BAYMINETTE AL
2017-05-03 251-255-1XXX 1000–1999Assigned ONVOY, LLC - AL 604E EVERGREEN AL
2017-05-03 251-255-8XXX 8000–8999Assigned ONVOY, LLC - AL 604E EVERGREEN AL
2017-05-03 251-286-2XXX 2000–2999Assigned ONVOY, LLC - AL 604E BREWTON AL
2017-05-03 251-317-7XXX 7000–7999Assigned ONVOY, LLC - AL 604E CITRONELLE AL
2017-05-03 251-317-8XXX 8000–8999Assigned ONVOY, LLC - AL 604E CITRONELLE AL
2017-05-03 251-320-0XXX 0000–0999Assigned ONVOY, LLC - AL 604E JACKSON AL
2017-05-03 251-320-1XXX 1000–1999Assigned ONVOY, LLC - AL 604E JACKSON AL
2017-05-03 251-439-9XXX 9000–9999Assigned ONVOY, LLC - AL 604E MOBILE AL
2017-05-03 251-644-6XXX 6000–6999Assigned ONVOY, LLC - AL 604E MOBILE AL
2017-05-02 251-286-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F BREWTON AL
2017-04-11 251-266-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL 7221 MOBILE AL
2017-03-28 251-266-6XXX 6000–6999Assigned ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 MOBILE AL
2017-03-28 251-266-8XXX 8000–8999Assigned ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 MOBILE AL
2017-03-28 251-266-9XXX 9000–9999Assigned ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 MOBILE AL
2017-03-28 251-385-0XXX 0000–0999Assigned ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 MOBILE AL
2017-03-28 251-385-1XXX 1000–1999Assigned ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 MOBILE AL
2017-02-27 251-255-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F EVERGREEN AL
2017-02-27 251-255-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F EVERGREEN AL
2017-02-27 251-255-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F EVERGREEN AL
2017-02-08 251-266-0XXX 0000–0999Assigned BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MOBILE AL
2017-02-08 251-266-1XXX 1000–1999Assigned BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MOBILE AL
2017-02-08 251-266-2XXX 2000–2999Assigned BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MOBILE AL
2017-02-08 251-266-3XXX 3000–3999Assigned BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MOBILE AL
2017-02-08 251-266-4XXX 4000–4999Assigned BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MOBILE AL
2017-02-02 251-385-7XXX 7000–7999Assigned ONVOY, LLC - AL 604E MOBILE AL
2017-01-31 251-270-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 FAIRHOPE AL
2016-12-12 251-732-7XXX 7000–7999Assigned ONVOY, LLC - AL 604E FLOMATON AL
2016-12-12 251-732-8XXX 8000–8999Assigned ONVOY, LLC - AL 604E FLOMATON AL
2016-12-08 251-312-1XXX 1000–1999Assigned MCC TELEPHONY OF THE SOUTH, LLC - AL 773F REPTON AL
2016-12-08 251-706-9XXX 9000–9999Assigned ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 MOBILE AL
2016-12-08 251-930-9XXX 9000–9999Assigned ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 MOBILE AL
2016-12-07 251-930-2XXX 2000–2999Assigned METROPCS, INC. 5562 MOBILE 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.