NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

1 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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
2009-06-09 318-431 0XXX1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MANY LA
2009-06-08 318-414 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA LA - LLC 653C VIDALIA LA
2009-06-04 318-506 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C DELTA LA
2009-02-18 318-432 0XXX1XXX4XXX7XXX8XXX · 3 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MONROE LA
2008-09-23 318-754 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - LA 749E SHREVEPORT LA
2008-08-25 318-615 0XXX1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F HAUGHTON LA
2008-06-30 318-200 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F SHREVEPORT LA
2008-06-12 318-734 0XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - LA 749E SHREVEPORT LA
2008-04-30 318-639 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA LA - LLC 653C MINDEN LA
2008-02-28 318-762 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 SHREVEPORT LA
2008-02-20 318-654 0–9 XXXall 10 · 5 holders which blocks → TEC OF JACKSON, INC. - LA 984D MONROE LA
2008-02-14 318-769 0–9 XXXall 10 · 5 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 ALEXANDRIA LA
2007-08-23 318-936 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BLANCHARD LA
2007-06-20 318-946 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SHREVEPORT LA
2007-06-18 318-918 0XXX1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 SHREVEPORT LA
2007-05-04 318-884 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MONROE LA
2007-04-11 318-966 0–9 XXXall 10 · 3 holders which blocks → CENTURYLINK COMMUNICATIONS LLC - LA 2896 MONROE LA
2007-02-17 318-947 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS LLC - LA 2896 MANSFIELD LA
2006-10-16 318-658 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SHREVEPORT LA
2006-10-16 318-828 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SHREVEPORT LA
2006-08-18 318-771 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 SHREVEPORT LA
2006-08-01 318-822 0XXX1XXX2XXX3XXX4XXX5XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F DELHI LA
2006-07-20 318-779 0XXX1XXX2XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J SHREVEPORT LA
2006-04-11 318-787 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 ALEXANDRIA LA
2006-04-11 318-855 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 MONROE LA
2006-03-30 318-737 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MONROE LA
2006-03-30 318-914 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MONROE LA
2006-03-28 318-717 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MARKSVILLE LA
2006-03-08 318-535 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WINNSBORO LA
2006-01-25 318-703 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 TELECOM OF LOUISIANA, LLC - LA 7488 SHREVEPORT LA
2005-11-03 318-557 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MONROE LA
2005-08-22 318-733 3XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 ELIZABETH LA
2005-08-15 318-789 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MONROE LA
2005-06-29 318-990 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SHREVEPORT LA
2005-04-28 318-903 0XXX2XXX3XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J VIDALIA LA
2005-04-28 318-907 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J WINNSBORO LA
2005-04-26 318-743 0XXX2XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J DOYLINE LA
2005-04-26 318-905 0XXX1XXX3XXX4XXX5XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J BENTON LA
2005-04-26 318-909 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J HAUGHTON LA
2005-04-26 318-916 none assigned yet which blocks → PAETEC ITEL, LLC 829J MOORINGSPT LA
2005-04-13 318-935 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 BENTON LA
2005-02-23 318-816 4XXX5XXX6XXX7XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 MONROE LA
2005-02-16 318-973 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J GREENWOOD LA
2004-10-28 318-607 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 GIBSLAND LA
2004-10-20 318-406 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 LECOMPTE LA
2004-10-20 318-596 0XXX1XXX3XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 GRAMBLING LA
2004-10-20 318-598 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 STERLINGTN LA
2004-10-20 318-599 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 CALHOUN LA
2004-10-20 318-602 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 MANY LA
2004-10-20 318-618 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 GRAND CANE LA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.