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
2021-03-09 346-457 0–9 XXXall 10 · 5 holders which blocks → STRATUS NETWORKS 495J KATY TX
2021-03-09 419-413 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 VAN WERT OH
2021-03-09 432-282 0–9 XXXall 10 · 4 holders which blocks → STRATUS NETWORKS 495J ODESSA TX
2021-03-09 571-773 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - VA 138E DULLESMTRO VA
2021-03-09 575-247 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 ARTESIA NM
2021-03-09 657-492 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-03-09 657-493 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2021-03-09 657-922 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H HUNTITNBCH CA
2021-03-09 682-346 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GLENDALE TX
2021-03-09 701-971 0–9 XXXall 10 · 8 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 WAHPETON ND
2021-03-09 804-838 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - VA 138E DINWIDDIE VA
2021-03-09 806-726 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → STRATUS NETWORKS 495J AMARILLO TX
2021-03-09 915-273 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 EL PASO TX
2021-03-08 208-579 0–9 XXXall 10 · 4 holders which blocks → STRATUS NETWORKS 495J BOISE ID
2021-03-08 208-581 0–9 XXXall 10 · 4 holders which blocks → STRATUS NETWORKS 495J GENESEE ID
2021-03-08 229-491 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 VALDOSTA GA
2021-03-08 254-922 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J KILLEEN TX
2021-03-08 320-447 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLEAR LAKE MN
2021-03-08 405-870 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OK 409F YUKON OK
2021-03-08 405-873 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OK 409F SHAWNEE OK
2021-03-08 431-390 not yet reported which blocks → Bell Mobility 6574 Winnipeg —
2021-03-08 431-391 not yet reported which blocks → Bell Mobility 6574 Winnipeg —
2021-03-08 437-510 not yet reported which blocks → Bell Mobility 6574 Toronto —
2021-03-08 437-512 not yet reported which blocks → Bell Mobility 6574 Toronto —
2021-03-08 437-786 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2021-03-08 438-262 not yet reported which blocks → Bell Mobility 6574 Montreal —
2021-03-08 438-590 not yet reported which blocks → Bell Mobility 6574 Montreal —
2021-03-08 470-805 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ATLANTA NE GA
2021-03-08 480-761 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2021-03-08 531-257 0–9 XXXall 10 · 7 holders which blocks → ALLO COMMUNICATIONS LLC 907K VALENTINE NE
2021-03-08 531-400 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - NE 549E COLUMBUS NE
2021-03-08 561-645 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → TELNYX LLC 073H PAHOKEE FL
2021-03-08 571-506 0–9 XXXall 10 · 2 holders which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2021-03-08 681-354 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - WV 080F FOLLANSBEE WV
2021-03-08 689-766 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H KISSIMMEE FL
2021-03-08 774-636 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ROCHESTER MA
2021-03-08 803-970 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ROCK HILL SC
2021-03-08 814-990 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 3 holders which blocks → STRATUS NETWORKS 495J ERIE PA
2021-03-08 825-430 not yet reported which blocks → Bell Mobility 6574 Calgary —
2021-03-08 825-432 not yet reported which blocks → Bell Mobility 6574 Calgary —
2021-03-08 878-783 2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J AVONMORE PA
2021-03-08 947-235 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTHFIELD MI
2021-03-08 980-346 0–9 XXXall 10 · 3 holders which blocks → LEAP TELECOM, LLC 616J CHARLOTTE NC
2021-03-05 218-571 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → STRATUS NETWORKS 495J GRAND RPDS MN
2021-03-05 234-291 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → STRATUS NETWORKS 495J SHARON OH
2021-03-05 249-523 not yet reported which blocks → Iristel Inc. 154E Alliston —
2021-03-05 251-349 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 MOBILE AL
2021-03-05 251-353 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TELNYX LLC 073H PETERMAN AL
2021-03-05 269-633 0–9 XXXall 10 · 7 holders which blocks → TON80 COMMUNICATIONS, LLC 516J KALAMAZOO MI
2021-03-05 307-305 8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MIDWEST WY

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.