NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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
8X8, INC. 39
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 20
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
2003-09-17 337-378 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 LEESVILLE LA
2003-09-17 337-381 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 TELECOM OF LOUISIANA, LLC - LA 7488 OPELOUSAS LA
2003-09-17 337-384 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CROWLEY LA
2003-09-17 337-385 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J ABBEVILLE LA
2003-09-17 819-996 not yet reported which blocks → TELUS Mobility 8303 Trois-Rivieres —
2003-09-16 450-341 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 St-Lambert —
2003-09-16 450-572 not yet reported which blocks → Bell Canada 8050 Chambly —
2003-09-16 605-588 none assigned yet which blocks → MIDCONTINENT COMMUNICATIONS. - SD 7076 WEBSTER SD
2003-09-16 613-227 not yet reported which blocks → TELUS Mobility 8303 Ottawa-Hull —
2003-09-16 778-222 not yet reported which blocks → TELUS Mobility 8301 Vancouver —
2003-09-16 780-220 not yet reported which blocks → TELUS Mobility 8301 Edmonton —
2003-09-16 828-335 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ASHEVILLE NC
2003-09-16 828-341 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → UNITED STATES CELLULAR - NC 6282 BRYSONCITY NC
2003-09-16 828-346 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → UNITED STATES CELLULAR - NC 6282 ROBBINSVL NC
2003-09-16 828-347 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → UNITED STATES CELLULAR - NC 6282 FRANKLIN NC
2003-09-16 828-360 0XXX1XXX2XXX3XXX8XXX9XXX · 3 holders which blocks → UNITED STATES CELLULAR - NC 6282 MURPHY NC
2003-09-16 954-697 1XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - FL 8664 DEERFLDBCH FL
2003-09-16 954-827 1XXX4XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - FL 8664 CORAL SPG FL
2003-09-15 251-923 0–9 XXXall 10 · 2 holders which blocks → TELEPAK NETWORKS, INC. - AL 947G FOLEY AL
2003-09-15 256-619 3XXX4XXX5XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 FORT PAYNE AL
2003-09-15 256-628 3XXX4XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SCOTTSBORO AL
2003-09-15 580-929 9XXX which blocks → CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 4630 KONAWA OK
2003-09-15 870-415 3XXX6XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 CROSSETT AR
2003-09-15 903-431 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 LONGVIEW TX
2003-09-15 906-201 3XXX5XXX6XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 L ANSE MI
2003-09-15 906-202 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MUNISING MI
2003-09-15 907-617 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KETCHIKAN AK
2003-09-12 250-893 not yet reported which blocks → TELUS Mobility 8301 Victoria —
2003-09-12 250-896 not yet reported which blocks → TELUS Mobility 8301 Victoria —
2003-09-12 309-318 0XXX1XXX2XXX7XXX8XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 MACOMB IL
2003-09-12 514-795 not yet reported which blocks → Bell Mobility 6574 Montreal —
2003-09-12 606-594 1XXX2XXX3XXX4XXX5XXX6XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KY 6500 MANCHESTER KY
2003-09-12 606-595 1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KY 6500 BARBOURVL KY
2003-09-12 902-840 not yet reported which blocks → Aliant Telecom (NS) 8089 Middleton —
2003-09-11 205-474 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → SOUTHERN COMMUNICATIONS SERVICES, INC. 6744 BUTLER AL
2003-09-11 205-475 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BESSEMER AL
2003-09-11 251-242 2XXX4XXX6XXX7XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 CHATOM AL
2003-09-11 307-254 6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 POWELL WY
2003-09-11 334-438 1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → SOUTHERN COMMUNICATIONS SERVICES, INC. 6744 THOMASTON AL
2003-09-11 402-209 4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE 5807 NEBRASKACY NE
2003-09-11 601-746 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → SOUTHERN COMMUNICATIONS SERVICES, INC. 6744 POPLARVL MS
2003-09-10 304-390 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → FIBERNET, LLC - WV 4095 MILTON WV
2003-09-10 631-343 0–9 XXXall 10 · 5 holders which blocks → CSC VOICE, LLC 612K COMMACK NY
2003-09-10 631-365 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 BRENTWOOD NY
2003-09-10 803-815 not yet reported which blocks → FAIRFIELD COMMUNICATIONS, INC. - SC 863A WINNSBORO SC
2003-09-10 843-420 0–9 XXXall 10 · 8 holders which blocks → PAETEC ITEL, LLC 829J TIMMONSVL SC
2003-09-09 304-985 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → COMMUNICATIONS PLUS, INC. - WV 4601 MORGANTOWN WV
2003-09-09 540-233 6XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WOODSTOCK VA
2003-09-09 601-747 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 6396 PORTGIBSON MS
2003-09-09 601-748 4XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 6396 BROOKHAVEN MS

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.