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
2021-02-08 575-554 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NM 206F ALAMOGORDO NM
2021-02-08 575-665 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NM 206F HOBBS NM
2021-02-08 581-926 not yet reported which blocks → TELUS Quebec 8083 Saint-Stanislas —
2021-02-08 581-948 not yet reported which blocks → TELUS Quebec 8083 Carleton —
2021-02-08 581-949 not yet reported which blocks → TELUS Quebec 8083 New Richmond —
2021-02-08 581-951 not yet reported which blocks → TELUS Quebec 8083 Pointe-a-la-Croix —
2021-02-08 581-953 not yet reported which blocks → TELUS Quebec 8083 Portneuf —
2021-02-08 581-954 not yet reported which blocks → TELUS Quebec 8083 Saint-Augustin —
2021-02-08 581-956 not yet reported which blocks → TELUS Quebec 8083 Saint-Marc-des-Carrieres —
2021-02-08 581-957 not yet reported which blocks → TELUS Quebec 8083 Saint-Raymond —
2021-02-08 606-350 0XXX1XXX2XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KY 6500 STNSWHLYCY KY
2021-02-08 607-670 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC- NY 384C STAMFORD NY
2021-02-08 628-477 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H MILLVALLEY CA
2021-02-08 629-736 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NASHVILLE TN
2021-02-08 662-410 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CLEVELAND MS
2021-02-08 757-798 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 SMITHFIELD VA
2021-02-08 774-464 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 BARNSTABLE MA
2021-02-08 804-604 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - VA 138E SANDSTON VA
2021-02-08 859-210 0XXX1XXX2XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KY 6500 SPRINGFLD KY
2021-02-08 864-837 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GREENVILLE SC
2021-02-08 912-569 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WAYCROSS GA
2021-02-08 938-426 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LEIGHTON AL
2021-02-08 986-837 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BOISE ID
2021-02-08 989-699 0XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H ST LOUIS MI
2021-02-05 216-770 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H CLEVELAND OH
2021-02-05 226-814 not yet reported which blocks → TekSavvy Solutions Inc 548H Ailsa Craig —
2021-02-05 307-445 0XXX1XXX2XXX3XXX4XXX5XXX9XXX · 3 holders which blocks → ONVOY, LLC - WY 450F KEMMERER WY
2021-02-05 307-500 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - WY 450F BORDER WY
2021-02-05 307-556 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WY 450F RIVERTON WY
2021-02-05 385-403 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - UT 871E FARMINGTON UT
2021-02-05 385-406 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - UT 871E SPANIHFORK UT
2021-02-05 414-415 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H MILWAUKZN3 WI
2021-02-05 458-446 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OR 750E ONTARIO OR
2021-02-05 540-670 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H FREDECKSBG VA
2021-02-05 571-710 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H LORTON VA
2021-02-05 573-952 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 FLAT RIVER MO
2021-02-05 606-609 0XXX1XXX2XXX6XXX7XXX9XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H EWING KY
2021-02-05 618-642 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCC NETWORK SERVICES, LLC 075A GREENVILLE IL
2021-02-05 701-808 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - ND 452F EMERADO ND
2021-02-05 719-403 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TELNYX LLC 073H AGUILAR CO
2021-02-05 802-807 0XXX1XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - VT 451F FAIRFAX VT
2021-02-05 878-243 0–9 XXXall 10 · 7 holders which blocks → TELNYX LLC 073H WASHINGTON PA
2021-02-05 910-841 0XXX1XXX2XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - NC 638E MAXTON NC
2021-02-05 970-831 0XXX1XXX2XXX4XXX6XXX8XXX9XXX · 5 holders which blocks → TELNYX LLC 073H BRUSH CO
2021-02-04 224-371 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC 224C GRAYSLAKE IL
2021-02-04 226-607 not yet reported which blocks → TekSavvy Solutions Inc 548H Galt —
2021-02-04 226-608 not yet reported which blocks → TekSavvy Solutions Inc 548H Hespeler —
2021-02-04 226-609 not yet reported which blocks → TekSavvy Solutions Inc 548H Kitchener-Waterloo —
2021-02-04 226-695 not yet reported which blocks → TekSavvy Solutions Inc 548H Linwood —
2021-02-04 226-709 not yet reported which blocks → TekSavvy Solutions Inc 548H New Dundee —

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.