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
2021-12-10 660-688 0XXX1XXX6XXX8XXX · 3 holders which blocks → ONVOY, LLC - MO 093F ATHENS MO
2021-12-10 661-569 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BKFD MAIN CA
2021-12-10 667-384 0XXX1XXX8XXX · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J SALISBURY MD
2021-12-10 667-385 0XXX1XXX2XXX3XXX4XXX5XXX8XXX · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J SOLOMONS MD
2021-12-10 680-230 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J UTICA NY
2021-12-10 716-582 0XXX5XXX6XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E BOSTON NY
2021-12-10 747-320 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CANOGAPARK CA
2021-12-10 816-493 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 CAMERON MO
2021-12-10 816-538 0–9 XXXall 10 · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 ST JOSEPH MO
2021-12-10 839-208 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BARNWELL SC
2021-12-10 848-323 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 EATONTOWN NJ
2021-12-10 878-300 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J NEW CASTLE PA
2021-12-10 917-813 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN04 NY
2021-12-10 920-812 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J FONDDU LAC WI
2021-12-10 929-612 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC- NY 384C NWYRCYZN06 NY
2021-12-10 930-253 0XXX2XXX5XXX6XXX9XXX · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FLAT ROCK IN
2021-12-10 937-819 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 MARYSVILLE OH
2021-12-10 939-343 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 NARANJITO PR
2021-12-10 939-608 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 SAN GERMAN PR
2021-12-10 951-605 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 WOODCREST CA
2021-12-10 980-398 0–9 XXXall 10 · 5 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 MONROE NC
2021-12-09 279-277 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H RSVL CTHT CA
2021-12-09 431-452 not yet reported which blocks → Fibernetics Corporation 464D Dugald —
2021-12-09 431-453 not yet reported which blocks → Fibernetics Corporation 464D Elie —
2021-12-09 431-454 not yet reported which blocks → Fibernetics Corporation 464D Macgregor —
2021-12-09 515-945 1XXX2XXX3XXX4XXX · 3 holders which blocks → AUREON COMMUNICATIONS, LLC 444G RANDALL IA
2021-12-09 539-268 0XXX1XXX8XXX · 3 holders which blocks → CROSS CABLE TELEVISION, LLC - OK 809H SKIATOOK OK
2021-12-09 539-289 0XXX1XXX7XXX8XXX · 4 holders which blocks → CROSS CABLE TELEVISION, LLC - OK 809H DRUMRIGHT OK
2021-12-09 619-975 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DULZURA CA
2021-12-09 747-441 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C GLENDALE CA
2021-12-09 913-414 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 GARDNER KS
2021-12-09 959-236 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J HARTFORD CT
2021-12-09 989-431 3XXX4XXX9XXX · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 CASS CITY MI
2021-12-08 209-864 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ATWATER CA
2021-12-08 209-901 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C STOCKTON CA
2021-12-08 223-272 0–9 XXXall 10 · 5 holders which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 GETTYSBURG PA
2021-12-08 223-285 0–9 XXXall 10 · 5 holders which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 MECHANCSBG PA
2021-12-08 272-280 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 SAYLORSBG PA
2021-12-08 272-283 0XXX2XXX3XXX8XXX9XXX · 5 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 MILL HALL PA
2021-12-08 272-291 0–9 XXXall 10 · 5 holders which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 TAMAQUA PA
2021-12-08 305-452 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E NORTH DADE FL
2021-12-08 314-940 0–9 XXXall 10 · 6 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J ST LOUIS MO
2021-12-08 314-967 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LADUE MO
2021-12-08 319-539 3XXX which blocks → ONVOY, LLC - IA 221F RIVERSIDE IA
2021-12-08 445-229 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 YARDLEY PA
2021-12-08 445-232 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHLDLPHZN1 PA
2021-12-08 478-350 1XXX2XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J BARTOW GA
2021-12-08 501-498 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J LITTLEROCK AR
2021-12-08 513-949 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 WAYNESVL OH
2021-12-08 515-581 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → UNITED STATES CELLULAR - IA 6266 ADEL IA

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.