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
2004-10-18 318-504 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 EPPS LA
2004-10-18 318-595 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 DUBACH LA
2004-05-19 318-520 0–9 XXXall 10 · 4 holders which blocks → CP-TEL NETWORK SERVICES, INC. - LA 1762 CASTOR LA
2004-05-19 318-808 0XXX1XXX2XXX7XXX8XXX · 4 holders which blocks → CP-TEL NETWORK SERVICES, INC. - LA 1762 FLORIEN LA
2004-05-19 318-824 0–9 XXXall 10 · 5 holders which blocks → CP-TEL NETWORK SERVICES, INC. - LA 1762 ZWOLLE LA
2004-05-19 318-887 0XXX1XXX2XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → CP-TEL NETWORK SERVICES, INC. - LA 1762 CONVERSE LA
2004-05-19 318-889 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → CP-TEL NETWORK SERVICES, INC. - LA 1762 HORNBECK LA
2004-05-19 318-906 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → CP-TEL NETWORK SERVICES, INC. - LA 1762 LOGANSPORT LA
2004-05-19 318-931 0–9 XXXall 10 · 5 holders which blocks → CP-TEL NETWORK SERVICES, INC. - LA 1762 ROBELINE LA
2004-05-14 318-775 0–9 XXXall 10 · 7 holders which blocks → COMCAST IP PHONE, LLC 318J KEITHVILLE LA
2004-04-23 318-588 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 SHREVEPORT LA
2004-03-26 318-587 2XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 COTTONPORT LA
2004-03-16 318-316 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 JENA LA
2004-03-16 318-363 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 HEBRON LA
2004-03-16 318-477 7XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MANGHAM LA
2004-03-16 318-622 none assigned yet which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 OAK RIDGE LA
2004-03-16 318-837 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WISNER LA
2004-02-24 318-974 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 BASTROP LA
2004-01-28 318-489 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BLANCHARD LA
2004-01-21 318-584 6XXX7XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 SHREVEPORT LA
2004-01-09 318-533 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 JONESBORO LA
2003-12-05 318-225 3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 HOMER LA
2003-08-18 318-579 2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 ARCADIA LA
2003-08-18 318-583 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 SALINE LA
2003-07-23 318-578 none assigned yet which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 SPRINGHILL LA
2003-07-10 318-474 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 TALLULAH LA
2003-07-10 318-566 0XXX3XXX7XXX8XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 RAYVILLE LA
2003-06-16 318-558 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 MARION LA
2003-05-30 318-430 none assigned yet which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 HORNBECK LA
2003-05-30 318-498 4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WINNSBORO LA
2003-05-30 318-499 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MER ROUGE LA
2003-05-30 318-501 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 EPPS LA
2003-05-30 318-502 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 COLUMBIA LA
2003-05-30 318-510 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 SHREVEPORT LA
2003-05-30 318-521 1XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 NATCHITCHS LA
2003-05-27 318-488 3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 DELHI LA
2003-05-22 318-407 2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 COLFAX LA
2003-05-22 318-413 3XXX5XXX6XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 WINNFIELD LA
2003-05-22 318-417 7XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 RAYVILLE LA
2003-05-22 318-418 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 LKPROVIDNC LA
2003-05-22 318-434 4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 TALLULAH LA
2003-05-22 318-439 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 WINNSBORO LA
2003-05-22 318-475 3XXX4XXX6XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 JONESBORO LA
2003-05-22 318-478 3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 BERNICE LA
2003-05-21 318-408 7XXX8XXX9XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F SHREVEPORT LA
2003-05-20 318-315 7XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 MANY LA
2003-05-20 318-433 2XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 HAYNESVL LA
2003-02-19 318-405 1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ST LANDRY LA
2003-01-30 318-462 none assigned yet which blocks → PAETEC ITEL, LLC 829J JONESBORO LA
2003-01-30 318-468 not yet reported which blocks → PAETEC ITEL, LLC 829J GRAMBLING 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.