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
2021-12-29 515-904 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J DES MOINES IA
2021-12-29 531-495 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J OMAHA NE
2021-12-29 563-346 0–9 XXXall 10 · 7 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J DAVENPORT IA
2021-12-29 582-220 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J STATECOLLG PA
2021-12-29 582-867 0XXX1XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → COMMIO, LLC 939H ERIE PA
2021-12-29 659-215 0–9 XXXall 10 · 6 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J TUSCALOOSA AL
2021-12-29 726-217 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J SANANTONIO TX
2021-12-29 737-313 0–9 XXXall 10 · 6 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J AUSTIN TX
2021-12-29 769-279 0–9 XXXall 10 · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J JACKSON MS
2021-12-29 779-341 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JOLIET IL
2021-12-29 804-701 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J CHESTER VA
2021-12-29 865-427 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J KNOXVILLE TN
2021-12-29 913-418 0XXX2XXX3XXX6XXX8XXX9XXX · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 LOUISBURG KS
2021-12-29 940-334 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J DENTON TX
2021-12-29 956-669 0XXX1XXX7XXX9XXX · 2 holders which blocks → PEERLESS NETWORK OF TEXAS, LLC - TX 177F HARLINGEN TX
2021-12-29 980-577 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J BESSEMERCY NC
2021-12-28 218-613 9XXX which blocks → BOOST SUBSCRIBERCO L.L.C. 490J DULUTH MN
2021-12-28 240-896 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J HAGERSTOWN MD
2021-12-28 240-902 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → TWILIO INTERNATIONAL, INC. 506J DAMASCS240 MD
2021-12-28 256-953 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J HUNTSVILLE AL
2021-12-28 260-895 8XXX which blocks → TWILIO INTERNATIONAL, INC. 506J HAMILTON IN
2021-12-28 302-589 0–9 XXXall 10 · 6 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J LAUREL DE
2021-12-28 386-895 0–9 XXXall 10 · 4 holders which blocks → TWILIO INTERNATIONAL, INC. 506J NWSMYRNBCH FL
2021-12-28 479-895 0–9 XXXall 10 · 3 holders which blocks → TWILIO INTERNATIONAL, INC. 506J FORT SMITH AR
2021-12-28 507-851 0XXX9XXX · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J ROCHESTER MN
2021-12-28 650-663 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PACIFICA CA
2021-12-28 689-267 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J ORLANDO FL
2021-12-28 726-348 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H SANANTONIO TX
2021-12-28 930-255 5XXX7XXX · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J EDINBURGH IN
2021-12-24 431-792 not yet reported which blocks → TELUS Mobility 8303 Winnipeg —
2021-12-24 782-773 not yet reported which blocks → TELUS Mobility 8303 Amherst —
2021-12-23 223-271 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J LANCASTER PA
2021-12-23 224-448 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BARRINGTON IL
2021-12-23 276-657 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J HAYSI VA
2021-12-23 334-843 0–9 XXXall 10 · 3 holders which blocks → POWERTEL BIRMINGHAM LICENSES, INC. 7475 EUFAULA AL
2021-12-23 417-897 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TWILIO INTERNATIONAL, INC. 506J SPRINGFLD MO
2021-12-23 437-261 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2021-12-23 437-262 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2021-12-23 437-263 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2021-12-23 470-914 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - GA 8392 CONYERS GA
2021-12-23 502-579 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J LOUISVILLE KY
2021-12-23 531-281 0XXX1XXX8XXX9XXX · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 TEKAMAH NE
2021-12-23 534-204 0–9 XXXall 10 · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J EAU CLAIRE WI
2021-12-23 586-310 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E MT CLEMENS MI
2021-12-23 586-328 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2021-12-23 660-556 0XXX1XXX2XXX6XXX9XXX · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 WARSAW MO
2021-12-23 662-866 0XXX1XXX3XXX6XXX8XXX9XXX · 4 holders which blocks → POWERTEL MEMPHIS LICENSES, INC. 7474 LULA MS
2021-12-23 707-930 2XXX7XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ANNAPOLIS CA
2021-12-23 762-305 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 COMMERCE GA
2021-12-23 775-492 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CARSON PL NV

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.