NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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 28
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
2019-08-06 202-923 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSHNGTNZN1 DC
2019-08-06 267-894 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 DOYLESTOWN PA
2019-08-06 385-349 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 PROVO UT
2019-08-06 470-569 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 ATLANTA NE GA
2019-08-06 608-607 0–9 XXXall 10 · 6 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K JANESVILLE WI
2019-08-06 925-534 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LIVERMORE CA
2019-08-05 337-455 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - LA 749E BREAUX BDG LA
2019-08-05 337-472 0–9 XXXall 10 · 8 holders which blocks → ONVOY, LLC - LA 749E MAMOU LA
2019-08-05 337-473 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - LA 749E RAGLEY LA
2019-08-05 337-481 0XXX4XXX7XXX · 2 holders which blocks → ONVOY, LLC - LA 749E STARKS LA
2019-08-05 424-436 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 SNMN SNMN CA
2019-08-05 430-529 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H SULPHURSPG TX
2019-08-05 501-369 0–9 XXXall 10 · 4 holders which blocks → EXIANT COMMUNICATIONS LLC 114J LITTLEROCK AR
2019-08-05 520-372 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J TUCSON AZ
2019-08-05 704-610 0–9 XXXwhole prefix which blocks → ONVOY, LLC - NC 638E LOCUST NC
2019-08-05 904-526 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 MIDDLEBURG FL
2019-08-05 936-529 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H CONROE TX
2019-08-03 930-529 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H HAZLETON IN
2019-08-03 930-777 0XXX1XXX2XXX3XXX7XXX · 5 holders which blocks → FRACTEL, LLC 965H HUNTINGBG IN
2019-08-02 202-221 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - DC 850D WSHNGTNZN1 DC
2019-08-02 226-703 not yet reported which blocks → Iristel Inc. 154E Windsor —
2019-08-02 226-704 not yet reported which blocks → Iristel Inc. 154E Windsor —
2019-08-02 236-608 not yet reported which blocks → Iristel Inc. 154E Vancouver —
2019-08-02 236-609 not yet reported which blocks → Iristel Inc. 154E Vancouver —
2019-08-02 236-706 not yet reported which blocks → Iristel Inc. 154E West Vancouver —
2019-08-02 236-707 not yet reported which blocks → Iristel Inc. 154E West Vancouver —
2019-08-02 236-708 not yet reported which blocks → Iristel Inc. 154E West Vancouver —
2019-08-02 581-381 not yet reported which blocks → TELUS Quebec 2243 St-Ephrem-de-Beauce —
2019-08-02 581-625 not yet reported which blocks → TELUS Quebec 2243 St-Victor-de-Beauce —
2019-08-02 602-610 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2019-08-02 608-605 0XXX1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - WI 225C KENDALL WI
2019-08-02 706-640 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - GA 067D RANGER GA
2019-08-02 815-658 0XXX1XXX2XXX4XXX6XXX8XXX · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 NEWARK IL
2019-08-02 848-276 0–9 XXXall 10 · 6 holders which blocks → CABLEVISION LIGHTPATH, INC. - NJ 4948 PTPLEASANT NJ
2019-08-02 902-608 not yet reported which blocks → Iristel Inc. 154E Windsor —
2019-08-02 902-609 not yet reported which blocks → Iristel Inc. 154E Windsor —
2019-08-02 930-800 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H BOONVILLE IN
2019-08-02 930-900 0XXX1XXX2XXX3XXX4XXX6XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H DUBOIS IN
2019-08-01 365-866 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Brampton —
2019-08-01 517-246 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G LANSING MI
2019-08-01 571-415 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 HAYMARKET VA
2019-08-01 573-666 0XXX1XXX2XXX6XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H BOWLNGGREN MO
2019-08-01 573-800 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H CENTER MO
2019-08-01 573-900 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H PERRYVILLE MO
2019-08-01 608-570 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 RICHLD CTR WI
2019-08-01 608-684 0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - WI 007F FOOTVILLE WI
2019-08-01 640-529 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H MOUNTHOLLY NJ
2019-08-01 660-300 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → FRACTEL, LLC 965H GRANT CITY MO
2019-08-01 660-444 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H GLASGOW MO
2019-08-01 660-800 0XXX1XXX5XXX7XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H CHILLICOTH MO

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.