NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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
2021-12-20 775-491 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J RENO NV
2021-12-20 830-359 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 NEWBRANFLS TX
2021-12-20 913-415 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J KANSASCITY KS
2021-12-17 223-270 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J LEBANON PA
2021-12-17 256-951 0–9 XXXall 10 · 4 holders which blocks → POWERTEL BIRMINGHAM LICENSES, INC. 7475 ARAB AL
2021-12-17 352-933 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 LEESBURG FL
2021-12-17 385-452 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J PROVO UT
2021-12-17 385-453 0–9 XXXall 10 · 6 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J OGDEN UT
2021-12-17 435-317 0–9 XXXall 10 · 8 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J LOGAN UT
2021-12-17 520-601 0XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 SELLS AZ
2021-12-17 520-607 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CASAGRANDE AZ
2021-12-17 534-277 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - WI 225C STEVENS PT WI
2021-12-17 575-270 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J LAS CRUCES NM
2021-12-17 582-205 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F BELLEFONTE PA
2021-12-17 612-887 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MN 184D TWINCITIES MN
2021-12-17 620-571 0XXX1XXX2XXX5XXX · 4 holders which blocks → IDEATEK TELCOM, LLC - KS 014E MEADE KS
2021-12-17 754-282 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E POMPANOBCH FL
2021-12-17 804-603 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F BETHIA VA
2021-12-17 804-630 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F CHESTER VA
2021-12-17 916-938 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SO PLACER CA
2021-12-17 986-217 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J BOISE ID
2021-12-16 365-766 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Burlington —
2021-12-16 365-966 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Burlington —
2021-12-16 463-261 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J INDIANAPLS IN
2021-12-16 470-907 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA NE GA
2021-12-16 470-908 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA NE GA
2021-12-16 509-970 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J SPOKANE WA
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

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.