NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
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
2004-10-29 719-218 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
2004-10-27 706-801 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 HAMILTON GA
2004-10-27 706-813 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 HOGANSVL GA
2004-10-27 706-890 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 CUSSETA GA
2004-10-27 731-907 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TN 4806 HORNBEAK TN
2004-10-27 850-312 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 MUNSON FL
2004-10-27 850-367 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 JAY FL
2004-10-27 850-396 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 HOLLEYNVRR FL
2004-10-27 850-397 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 SUNNYHILLS FL
2004-10-27 850-403 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 YONGSTFNTN FL
2004-10-27 865-630 0–9 XXXall 10 · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TN 4806 LAKE CITY TN
2004-10-27 912-312 8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 RICHMONDHL GA
2004-10-27 931-516 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TN 4806 CUMBERLDCY TN
2004-10-27 970-279 0XXX1XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CO 6118 BASALT CO
2004-10-27 970-344 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CO 6118 BERTHOUD CO
2004-10-27 970-639 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CO 6118 FRUITA CO
2004-10-27 970-660 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CO 6118 JOHNSTMLKN CO
2004-10-27 989-668 1XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → WESTPHALIA BROADBAND, INC. - MI 591C ST JOHNS MI
2004-10-26 270-681 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 JORDAN KY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.