NumberResearch Membership · Data 09/24/2026

Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026

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. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 31
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
ONVOY, LLC - NJ 15
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
2004-11-01 417-784 not yet reported which blocks → RYSTEC, INC 142C LOWRY CITY MO
2004-11-01 417-795 not yet reported which blocks → RYSTEC, INC 142C DADEVILLE MO
2004-11-01 417-806 not yet reported which blocks → RYSTEC, INC 142C OSCEOLA MO
2004-11-01 417-819 not yet reported which blocks → RYSTEC, INC 142C CROSSTMBRS MO
2004-11-01 417-977 not yet reported which blocks → RYSTEC, INC 142C ARCOLA MO
2004-11-01 443-437 0–9 XXXall 10 · 8 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MD 7325 POCOMOKE MD
2004-11-01 443-439 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 TRAPPE MD
2004-11-01 443-446 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 QUEENSTOWN MD
2004-11-01 443-448 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → COMCAST IP PHONE, LLC 318J DENTON MD
2004-11-01 478-271 not yet reported which blocks → COMSOUTH TELENET, INC. - GA 9161 COCHRAN GA
2004-11-01 480-247 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2004-11-01 678-550 0–9 XXXwhole prefix which blocks → LEVEL 3 TELECOM OF GEORGIA, LP - GA 7490 ATLANTA NW GA
2004-11-01 702-553 0–9 XXXall 10 · 4 holders which blocks → MATRIX TELECOM, LLC. S/I/I TNCI - NV 2817 LAS VEGAS NV
2004-11-01 807-465 not yet reported which blocks → KMTS, a division of Bell Canada 8218 Kenora —
2004-11-01 864-285 0–9 XXXall 10 · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K SPARTANBG SC
2004-10-29 253-495 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2004-10-29 408-627 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SNJS NORTH CA
2004-10-29 605-271 not yet reported which blocks → MIDCONTINENT COMMUNICATIONS. - SD 7076 SIOUX FLS SD
2004-10-29 719-218 0–9 XXXwhole prefix which blocks → LEVEL 3 TELECOM OF COLORADO, LLC - CO 7590 COLORDOSPG CO
2004-10-29 918-553 0–9 XXXall 10 · 7 holders which blocks → AT&T ENTERPRISES, LLC 516C COLLINSVL OK
2004-10-28 217-513 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → MCC TELEPHONY LLC 593K DE LAND IL
2004-10-28 229-326 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 TIFTON GA
2004-10-28 229-351 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 CAMILLA GA
2004-10-28 229-355 0–9 XXXall 10 · 6 holders which blocks → SOUTHERN COMMUNICATIONS SERVICES, INC. 6744 CAMILLA GA
2004-10-28 229-394 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 NEWTON GA
2004-10-28 229-471 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 BACONTON GA
2004-10-28 256-333 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AL 5255 RED BAY AL
2004-10-28 256-602 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AL 5255 TOWN CREEK AL
2004-10-28 256-664 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AL 5255 KILLEN AL
2004-10-28 256-667 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AL 5255 LEXINGTON AL
2004-10-28 318-607 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 GIBSLAND LA
2004-10-28 321-216 0–9 XXXall 10 · 6 holders which blocks → METROPCS NETWORKS, LLC 899D MELBOURNE FL
2004-10-28 361-733 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C HALLETTSVL TX
2004-10-28 478-202 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 WADLEY GA
2004-10-28 602-575 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 7552 PHOENIX AZ
2004-10-28 786-259 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 HOMESTEAD FL
2004-10-28 912-319 0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 JEKYLL IS GA
2004-10-28 912-434 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 STSIMONSIS GA
2004-10-28 913-416 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TONGANOXIE KS
2004-10-28 919-502 0–9 XXXall 10 · 5 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 KENLY NC
2004-10-28 971-232 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OR 3234 NORTH PL OR
2004-10-27 317-449 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C ACTON IN
2004-10-27 517-277 not yet reported which blocks → WESTPHALIA BROADBAND, INC. - MI 591C DE WITT MI
2004-10-27 520-777 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 7552 TUCSON AZ
2004-10-27 631-885 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 BRENTWOOD NY
2004-10-27 662-750 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WALNUT MS
2004-10-27 678-863 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WINDER GA
2004-10-27 701-369 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - ND 8054 HICKSON ND
2004-10-27 706-751 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 HEPHZIBAH GA
2004-10-27 706-760 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 APPLING GA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.