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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2021-12-16 548-557 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Guelph —
2021-12-16 582-204 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOALSBURG PA
2021-12-16 602-848 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2021-12-16 639-858 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Moose Jaw —
2021-12-16 650-647 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 REDWOOD CY CA
2021-12-16 707-909 0–9 XXXall 10 · 6 holders which blocks → SONIC TELECOM, LLC - CA 433E SANTA ROSA CA
2021-12-16 742-222 not yet reported which blocks → IXICA Communications Inc. 812H Brampton —
2021-12-16 873-467 not yet reported which blocks → Videotron Ltd. 8306 Danville —
2021-12-16 928-408 0–9 XXXall 10 · 6 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J YUMA AZ
2021-12-16 939-362 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 CAYEY PR
2021-12-15 220-218 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ATHENS OH
2021-12-15 234-340 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J AKRON OH
2021-12-15 272-285 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PLEASANTMT PA
2021-12-15 332-256 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN01 NY
2021-12-15 346-530 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2021-12-15 346-531 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2021-12-15 401-395 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → HD CARRIER LLC 321J CENTREDALE RI
2021-12-15 414-363 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - WI 225C MILWAUKZN3 WI
2021-12-15 423-740 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 CLEVELAND TN
2021-12-15 423-769 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - TN 124F BENTON TN
2021-12-15 440-692 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OH 464C VICTORY OH
2021-12-15 447-226 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J SPRINGFLD IL
2021-12-15 458-283 0XXX1XXX · 2 holders which blocks → QWEST CORPORATION 9638 JACKSONVL OR
2021-12-15 464-201 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OAK FOR SO IL
2021-12-15 502-886 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - KY 8406 LOUISVILLE KY
2021-12-15 520-632 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 CASAGRANDE AZ
2021-12-15 615-437 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TN 124F CARTHAGE TN
2021-12-15 667-388 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SEVERN MD
2021-12-15 726-582 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SANANTONIO TX
2021-12-15 743-242 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J GREENSBORO NC
2021-12-15 773-560 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 CHICGOZN06 IL
2021-12-15 804-713 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J MECHANCSVL VA
2021-12-15 810-296 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LAPEER MI
2021-12-15 830-350 0–9 XXXall 10 · 2 holders which blocks → STPCS JOINT VENTURE, LLC 4290 DEL RIO TX
2021-12-15 878-249 4XXX8XXX9XXX · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 LEECHBURG PA
2021-12-15 929-570 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN10 NY
2021-12-15 929-598 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN14 NY
2021-12-15 929-606 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN04 NY
2021-12-15 929-607 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN05 NY
2021-12-15 929-608 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN11 NY
2021-12-15 929-609 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN13 NY
2021-12-15 936-323 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 CONROE TX
2021-12-15 956-658 0–9 XXXall 10 · 2 holders which blocks → STPCS JOINT VENTURE, LLC 4290 MCALLEN TX
2021-12-15 984-296 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J RALEIGH NC
2021-12-15 989-451 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J SAGINAW MI
2021-12-14 225-471 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA 8764 LUTCHER LA
2021-12-14 239-383 0–9 XXXall 10 · 3 holders which blocks → MCI WORLDCOM COMMUNICATIONS, INC. - FL 7448 NAPLES FL
2021-12-14 256-949 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ANNISTON AL
2021-12-14 276-271 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 INDEPNDNCE VA
2021-12-14 319-407 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → UNITED STATES CELLULAR - IA 6266 WAVERLY 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.