NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

1 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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 — NPA 251
WIDE VOICE, LLC - AL 1
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
2019-11-19 251-318 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H MOBILE AL
2019-10-14 251-512 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AL 604E COFFEEVL AL
2019-10-14 251-850 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - AL 604E FAIRHOPE AL
2019-07-08 251-310 0–9 XXXall 10 · 3 holders which blocks → AT&T - LOCAL 7421 BELLEFONTN AL
2019-06-04 251-305 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J MOBILE AL
2019-05-16 251-293 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BELLEFONTN AL
2019-01-07 251-900 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AL 604E EXCEL AL
2018-11-16 251-572 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AL 604E FRISCOCITY AL
2018-10-12 251-651 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - AL 604E BAYMINETTE AL
2018-09-27 251-292 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F MELVIN AL
2018-09-19 251-351 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AL 604E BEATRICE AL
2018-09-19 251-451 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AL 604E GOSPORT AL
2018-09-19 251-551 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AL 604E PINE APPLE AL
2018-08-29 251-313 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AL 604E DAUPHIN IS AL
2018-03-13 251-283 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D MOBILE AL
2018-01-16 251-620 0–9 XXXall 10 · 4 holders which blocks → TELEPAK NETWORKS, INC. - AL 947G MOBILE AL
2017-08-23 251-355 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - AL 604E MOBILE AL
2017-05-19 251-278 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 FAIRHOPE AL
2017-04-29 251-277 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 MOBILE AL
2017-02-07 251-266 0–9 XXXall 10 · 4 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MOBILE AL
2017-02-01 251-385 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AL 604E MOBILE AL
2016-12-12 251-400 not yet reported which blocks → PINE BELT BROADCASTING DBA PINE BELT TEL COMP SVCS 9736 GROVE HILL AL
2016-12-07 251-312 0–9 XXXall 10 · 4 holders which blocks → MCC TELEPHONY OF THE SOUTH, LLC - AL 773F REPTON AL
2016-09-21 251-320 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 JACKSON AL
2016-09-02 251-264 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MOBILE AL
2016-05-09 251-930 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 MOBILE AL
2016-02-17 251-257 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AL 604E BELLEFONTN AL
2016-02-08 251-250 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AL 604E BAYMINETTE AL
2015-11-20 251-220 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AL 604E MOBILE AL
2015-10-29 251-309 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - AL 8271 BAYOUBATRE AL
2015-08-17 251-800 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - AL 604E MOBILE AL
2015-02-23 251-999 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AL 604E MOBILE AL
2015-02-18 251-444 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AL 604E MOBILE AL
2014-12-24 251-333 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AL 604E MOBILE AL
2014-10-03 251-888 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AL 604E MOBILE AL
2014-09-26 251-270 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 FAIRHOPE AL
2014-02-10 251-308 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J MOBILE AL
2013-03-07 251-307 0–9 XXXall 10 · 4 holders which blocks → PINE BELT BROADCASTING DBA PINE BELT TEL COMP SVCS 9736 MOBILE AL
2013-02-06 251-303 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 551G MOBILE AL
2012-11-09 251-301 0–9 XXXall 10 · 4 holders which blocks → TELEPAK NETWORKS, INC. - AL 947G MOBILE AL
2012-07-16 251-262 0–9 XXXall 10 · 6 holders which blocks → MCC TELEPHONY OF THE SOUTH, LLC - AL 773F JACKSON AL
2012-03-13 251-260 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F MELVIN AL
2012-02-21 251-206 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J MOBILE AL
2011-05-27 251-265 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C MT VERNON AL
2011-02-07 251-274 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C MCINTOSH AL
2010-12-16 251-600 0–9 XXXall 10 · 3 holders which blocks → MCC TELEPHONY OF THE SOUTH, LLC - AL 773F FOLEY AL
2010-11-29 251-500 0–9 XXXall 10 · 4 holders which blocks → MCC TELEPHONY OF THE SOUTH, LLC - AL 773F FOLEY AL
2010-05-20 251-299 0–9 XXXall 10 · 7 holders which blocks → MCC TELEPHONY OF THE SOUTH, LLC - AL 773F MT VERNON AL
2010-05-20 251-306 0–9 XXXall 10 · 5 holders which blocks → MCC TELEPHONY OF THE SOUTH, LLC - AL 773F IRNGTNSTEL AL
2010-05-04 251-314 0–9 XXXall 10 · 4 holders which blocks → MCC TELEPHONY OF THE SOUTH, LLC - AL 773F BREWTON AL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.