NumberResearch Membership · Data 09/28/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/28/2026

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 19
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
2020-01-14 463-227 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - IN 097D PITTSBORO IN
2020-01-14 469-756 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 FRISCO TX
2020-01-14 480-604 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-01-14 608-614 1XXX which blocks → MCC TELEPHONY OF THE MIDWEST, LLC - WI 983F ONTARIO WI
2020-01-14 608-652 1XXX7XXX · 2 holders which blocks → MCC TELEPHONY OF THE MIDWEST, LLC - WI 983F NORWALK WI
2020-01-14 608-660 1XXX6XXX · 2 holders which blocks → MCC TELEPHONY OF THE MIDWEST, LLC - WI 983F WILTON WI
2020-01-14 682-688 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TX 903C GRAPEVINE TX
2020-01-14 870-604 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JONESBORO AR
2020-01-14 956-484 0–9 XXXall 10 · 3 holders which blocks → STPCS JOINT VENTURE, LLC 4290 BROWNSVL TX
2020-01-13 236-235 not yet reported which blocks → TELUS 8086 Richmond —
2020-01-13 236-545 not yet reported which blocks → TELUS 8086 New Westminster —
2020-01-13 314-883 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 ST LOUIS MO
2020-01-13 332-221 0–9 XXXwhole prefix which blocks → INTRADO COMMUNICATIONS, LLC 831C NWYRCYZN01 NY
2020-01-13 352-652 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 BROOKSVL FL
2020-01-13 404-738 0–9 XXXwhole prefix which blocks → ONVOY, LLC - GA 067D ATLANTA GA
2020-01-13 404-882 0–9 XXXwhole prefix which blocks → ONVOY, LLC - GA 067D ATLANTA GA
2020-01-13 414-250 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 MILWAUKZN1 WI
2020-01-13 470-546 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA NE GA
2020-01-13 516-550 0–9 XXXall 10 · 6 holders which blocks → VONAGE AMERICA LLC 197D NASSAUZN01 NY
2020-01-13 631-401 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRENTWOOD NY
2020-01-13 650-955 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H HALFMOONBY CA
2020-01-13 707-727 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 UKIAH CA
2020-01-13 747-336 0–9 XXXall 10 · 8 holders which blocks → FRACTEL, LLC 965H RESEDA CA
2020-01-13 747-758 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H GLENDALE CA
2020-01-13 825-518 not yet reported which blocks → TELUS 8084 Camrose —
2020-01-13 914-387 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D WSCHSTZN08 NY
2020-01-13 931-290 0XXX4XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CELINA TN
2020-01-13 931-336 6XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MOSS TN
2020-01-10 236-307 not yet reported which blocks → TELUS 8086 Williams Lake —
2020-01-10 236-483 not yet reported which blocks → TELUS 8086 Abbotsford —
2020-01-10 279-203 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SCRM NORTH CA
2020-01-10 334-766 0XXX1XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → FRACTEL, LLC 965H DALEVILLE AL
2020-01-10 334-788 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H PRATTVILLE AL
2020-01-10 334-842 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → FRACTEL, LLC 965H BRUNDIDGE AL
2020-01-10 334-922 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H MONTGOMERY AL
2020-01-10 334-946 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H CLAYTON AL
2020-01-10 405-871 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H OKLA CITY OK
2020-01-10 423-407 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TWIN LAKES COMMUNICATIONS, INC. - TN 204G SPRINGCITY TN
2020-01-10 442-307 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 INDIO CA
2020-01-10 469-755 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2020-01-10 470-870 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - GA 067D ATLANTA GA
2020-01-10 737-265 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KYLE TX
2020-01-10 786-746 0–9 XXXwhole prefix which blocks → ONVOY, LLC - FL 937C MIAMI FL
2020-01-10 825-366 not yet reported which blocks → Bell Mobility 6574 Fox Creek —
2020-01-10 938-529 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H COLLINSVL AL
2020-01-10 951-480 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 HEMT HEMT CA
2020-01-10 970-730 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CO 6118 GRAND JCT CO
2020-01-09 202-932 0–9 XXXwhole prefix which blocks → ONVOY, LLC - DC 850D WSHNGTNZN1 DC
2020-01-09 231-285 0XXX1XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 CADILLAC MI
2020-01-09 236-482 not yet reported which blocks → TELUS 8086 Vancouver —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/28/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.