NumberResearch Membership · Data 09/21/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026

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. 38
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
2023-01-06 240-978 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ASHTON236 MD
2023-01-06 254-281 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 KILLEEN TX
2023-01-06 281-281 0–9 XXXall 10 · 2 holders which blocks → USFON, INC. - TX 473F HSTNSUBURB TX
2023-01-06 463-280 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 INDIANAPLS IN
2023-01-06 475-317 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2023-01-06 512-512 0–9 XXXall 10 · 2 holders which blocks → USFON, INC. - TX 473F AUSTIN TX
2023-01-06 561-913 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WPALMBEACH FL
2023-01-06 667-423 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ANNAPOLIS MD
2023-01-06 681-398 0XXX1XXX2XXX3XXX4XXX9XXX · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 FALLNGWTRS WV
2023-01-06 713-713 0–9 XXXall 10 · 2 holders which blocks → USFON, INC. - TX 473F HOUSTON TX
2023-01-06 727-931 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C CLEARWATER FL
2023-01-06 754-306 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DEERFLDBCH FL
2023-01-06 817-817 0–9 XXXall 10 · 2 holders which blocks → USFON, INC. - TX 473F FORT WORTH TX
2023-01-06 839-232 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CLOVER SC
2023-01-06 839-363 0XXX1XXX3XXX6XXX · 3 holders which blocks → ONVOY, LLC - SC 548E ESTILL SC
2023-01-06 854-236 0–9 XXXall 10 · 4 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 BEAUFORT SC
2023-01-06 854-580 0XXX2XXX5XXX9XXX · 4 holders which blocks → ONVOY, LLC - SC 548E AWENDAW SC
2023-01-06 854-654 0XXX1XXX5XXX8XXX · 3 holders which blocks → ONVOY, LLC - SC 548E MCCOLL SC
2023-01-06 870-967 0XXX1XXX2XXX8XXX · 3 holders which blocks → ONVOY, LLC - AR 348F CONCORD AR
2023-01-06 929-660 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN04 NY
2023-01-06 930-268 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COLUMBUS IN
2023-01-06 959-246 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 MIDDLETOWN CT
2023-01-05 276-291 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NORTON VA
2023-01-05 346-625 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 SPRING TX
2023-01-05 346-629 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 RICHMNRNBG TX
2023-01-05 346-631 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 RICHMNRNBG TX
2023-01-05 346-632 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 RICHMNRNBG TX
2023-01-05 365-639 not yet reported which blocks → Bell Mobility 6574 Hamilton —
2023-01-05 385-512 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 KAYSVILLE UT
2023-01-05 437-289 not yet reported which blocks → Bell Mobility 6574 Toronto —
2023-01-05 472-208 0–9 XXXall 10 · 4 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 CLINTON NC
2023-01-05 659-262 0–9 XXXall 10 · 2 holders which blocks → POWERTEL BIRMINGHAM LICENSES, INC. 7475 BIRMINGHAM AL
2023-01-05 659-263 0–9 XXXall 10 · 3 holders which blocks → POWERTEL BIRMINGHAM LICENSES, INC. 7475 SPRINGVL AL
2023-01-05 682-403 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ARLINGTON TX
2023-01-05 682-405 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ARLINGTON TX
2023-01-05 682-406 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ARLINGTON TX
2023-01-05 707-956 0XXX1XXX2XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 NAPA CA
2023-01-05 878-264 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 BEAVER FLS PA
2023-01-05 901-719 0XXX1XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - TN 525E MOSCOW TN
2023-01-05 914-537 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 WSCHSTZN01 NY
2023-01-04 220-244 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 DELAWARE OH
2023-01-04 234-359 0XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 AURORA OH
2023-01-04 239-412 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 FORT MYERS FL
2023-01-04 239-419 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BONITA SPG FL
2023-01-04 251-419 0–9 XXXwhole prefix which blocks → ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 ATMORE AL
2023-01-04 346-630 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 BAYTOWN TX
2023-01-04 351-236 0–9 XXXall 10 · 3 holders which blocks → IDT AMERICA, CORP. - MA 229C NEWBURYPT MA
2023-01-04 656-210 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 TAMPACEN FL
2023-01-04 657-646 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2023-01-04 657-648 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.