NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

2 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 225
ONVOY, LLC - LA 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 NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2018-11-02 225-427 0–9 XXXall 10 · 5 holders which blocks → AIRUS, INC. - LA 477H BATONROUGE LA
2018-07-11 225-438 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F SPRINGFLD LA
2018-06-19 225-418 0–9 XXXall 10 · 3 holders which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
2018-03-13 225-416 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D BATONROUGE LA
2018-02-16 225-403 1XXX6XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DUTCH TOWN LA
2017-12-13 225-390 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J GONZALES LA
2017-12-13 225-396 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J VACHERIE LA
2017-12-13 225-398 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J LUTCHER LA
2017-12-05 225-256 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J BATONROUGE LA
2017-08-31 225-523 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - LA 749E DENHAM SPG LA
2017-08-31 225-529 0–9 XXXwhole prefix which blocks → ONVOY, LLC - LA 749E BATONROUGE LA
2017-08-30 225-465 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - LA 749E BATONROUGE LA
2017-01-25 225-277 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F WILSON LA
2016-11-11 225-605 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA 8764 CLINTON LA
2016-10-19 225-998 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - LA 749E DENHAM SPG LA
2016-09-13 225-540 0–9 XXXwhole prefix which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 BATONROUGE LA
2016-09-01 225-351 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - LA 749E ROUGON LA
2016-09-01 225-513 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - LA 749E JACKSON LA
2016-05-18 225-480 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DENHAM SPG LA
2016-04-26 225-831 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - LA 749E BATONROUGE LA
2016-03-14 225-230 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - LA 749E TUNICA LA
2016-02-17 225-725 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - LA 749E DONALDSNVL LA
2016-02-16 225-461 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 GONZALES LA
2015-11-17 225-475 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - LA 749E BATONROUGE LA
2015-11-17 225-502 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - LA 749E BATONROUGE LA
2015-11-09 225-401 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 PLAQUEMINE LA
2015-08-17 225-666 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - LA 749E BATONROUGE LA
2015-08-14 225-900 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - LA 749E BATONROUGE LA
2015-06-15 225-960 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 BATONROUGE LA
2015-04-09 225-508 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BATONROUGE LA
2015-02-03 225-828 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 GONZALES LA
2015-01-28 225-800 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - LA 749E BATONROUGE LA
2015-01-05 225-503 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F DENHAM SPG LA
2014-08-15 225-380 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C DENHAM SPG LA
2014-05-21 225-470 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J WH CASTLE LA
2014-04-30 225-434 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 VACHERIE LA
2014-02-10 225-442 0–9 XXXall 10 · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J BATONROUGE LA
2013-12-13 225-217 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F NO CORNOR LA
2013-07-03 225-210 0–9 XXXall 10 · 3 holders which blocks → VOICESTREAM GSM I, LLC 150C GONZALES LA
2013-02-08 225-424 0–9 XXXall 10 · 4 holders which blocks → TELEPAK NETWORKS, INC. - LA 908A BATONROUGE LA
2012-10-31 225-407 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 551G BATONROUGE LA
2012-02-23 225-228 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J BATONROUGE LA
2011-11-08 225-224 0–9 XXXall 10 · 5 holders which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
2011-10-20 225-239 0–9 XXXall 10 · 5 holders which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
2011-08-09 225-280 0–9 XXXall 10 · 4 holders which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
2011-08-02 225-447 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 BATONROUGE LA
2011-07-29 225-349 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BATONROUGE LA
2011-07-29 225-421 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BATONROUGE LA
2011-07-28 225-250 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BATONROUGE LA
2011-07-08 225-443 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F ROUGON LA

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.