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 318
ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 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
2015-05-21 318-657 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F JONESVILLE LA
2015-01-28 318-626 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C SHREVEPORT LA
2015-01-28 318-800 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - LA 749E SHREVEPORT LA
2015-01-22 318-460 0–9 XXXall 10 · 6 holders which blocks → HUNT TELECOMMUNICATIONS, LLC - LA 181D MONROE LA
2015-01-15 318-660 0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA LA - LLC 653C SPRINGHILL LA
2014-12-08 318-570 0–9 XXXall 10 · 6 holders which blocks → ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 MONROE LA
2014-11-03 318-616 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F BUNKIE LA
2014-09-16 318-610 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA LA - LLC 653C KEITHVILLE LA
2014-08-12 318-620 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - LA 749E FARMERVL LA
2014-02-06 318-612 0–9 XXXall 10 · 5 holders which blocks → CSC VOICE, LLC 612K BOYCE LA
2013-11-15 318-604 6XXX7XXX8XXX9XXX · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J COTTONPORT LA
2013-11-15 318-704 0–9 XXXall 10 · 3 holders which blocks → CSC VOICE, LLC 612K ALEXANDRIA LA
2013-01-02 318-605 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J MONROE LA
2012-11-30 318-702 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C COUSHATTA LA
2012-11-02 318-606 0–9 XXXall 10 · 6 holders which blocks → NUSO, LLC 551G SHREVEPORT LA
2012-02-03 318-924 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 TELECOM OF LOUISIANA, LLC - LA 7488 BLANCHARD LA
2012-01-24 318-580 none assigned yet which blocks → ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 SHREVEPORT LA
2011-12-22 318-575 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MANSFIELD LA
2011-11-14 318-551 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 MONROE LA
2011-11-03 318-437 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C FERRIDAY LA
2011-11-03 318-625 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C ALEXANDRIA LA
2011-10-24 318-321 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ALEXANDRIA LA
2011-10-21 318-314 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 ALEXANDRIA LA
2011-10-21 318-317 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SHREVEPORT LA
2011-10-21 318-507 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SHREVEPORT LA
2011-10-20 318-319 0–9 XXXall 10 · 6 holders which blocks → ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 ALEXANDRIA LA
2011-10-04 318-206 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ALEXANDRIA LA
2011-09-12 318-313 9XXX which blocks → METROPCS, INC. 5562 SHREVEPORT LA
2011-05-13 318-369 0–9 XXXwhole prefix which blocks → ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 MONROE LA
2011-04-27 318-400 0XXX which blocks → ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 SHREVEPORT LA
2011-04-12 318-350 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MONROE LA
2011-03-18 318-582 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MONROE LA
2011-03-01 318-500 3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 MARKSVILLE LA
2011-02-01 318-568 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C DRY PRONG LA
2010-12-16 318-300 1XXX3XXX4XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 SHREVEPORT LA
2010-06-14 318-553 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 SHREVEPORT LA
2010-06-14 318-562 0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 6 holders which blocks → LEVEL 3 TELECOM OF LOUISIANA, LLC - LA 7488 SHREVEPORT LA
2010-05-11 318-540 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 SHREVEPORT LA
2010-03-24 318-519 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BLANCHARD LA
2010-03-17 318-532 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 SHREVEPORT LA
2010-03-17 318-536 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 ARCADIA LA
2010-02-01 318-538 0–9 XXXall 10 · 3 holders which blocks → HUNT TELECOMMUNICATIONS, LLC - LA 181D MONROE LA
2009-12-08 318-517 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 SHREVEPORT LA
2009-12-01 318-516 0–9 XXXall 10 · 3 holders which blocks → ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 MONROE LA
2009-09-03 318-528 0–9 XXXall 10 · 4 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 ALEXANDRIA LA
2009-08-28 318-594 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 COLUMBIA LA
2009-08-25 318-496 3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 OAK RIDGE LA
2009-08-24 318-374 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 JENA LA
2009-08-03 318-505 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 SHREVEPORT LA
2009-07-17 318-529 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 SHREVEPORT 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.