NumberResearch Membership · Data 09/28/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/28/2026

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 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
2020-02-19 469-809 0–9 XXXall 10 · 3 holders which blocks → HD CARRIER LLC 321J DALLAS TX
2020-02-19 469-846 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 MIDLOTHIAN TX
2020-02-19 517-842 2XXX4XXX5XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H GRASS LAKE MI
2020-02-19 603-255 0–9 XXXall 10 · 5 holders which blocks → CSC WIRELESS, LLC 425J MANCHESTER NH
2020-02-19 616-400 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H SARANAC MI
2020-02-19 734-356 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H ANN ARBOR MI
2020-02-19 734-766 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H ERIE MI
2020-02-19 737-267 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2020-02-19 779-270 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DE KALB IL
2020-02-19 806-707 0XXX1XXX2XXX6XXX7XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F HIGGINBTHM TX
2020-02-19 806-708 0XXX1XXX2XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F MEADOW TX
2020-02-19 806-709 0XXX1XXX2XXX7XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F ROPESVILLE TX
2020-02-19 825-423 not yet reported which blocks → Bell Mobility 6574 Calgary —
2020-02-18 249-868 not yet reported which blocks → TELUS Mobility 646F Sudbury —
2020-02-18 249-869 not yet reported which blocks → TELUS Mobility 646F Barrie —
2020-02-18 252-417 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 GREENVILLE NC
2020-02-18 405-846 1XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 TRIBBEY OK
2020-02-18 434-232 0–9 XXXall 10 · 5 holders which blocks → CSC WIRELESS, LLC 425J LYNCHBURG VA
2020-02-18 437-380 not yet reported which blocks → Bell Mobility 6574 Toronto —
2020-02-18 480-680 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2020-02-18 506-526 not yet reported which blocks → Iristel Inc. 154E Harvey Station —
2020-02-18 540-575 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → CSC WIRELESS, LLC 425J HARRISONBG VA
2020-02-18 540-590 0–9 XXXwhole prefix which blocks → ONVOY, LLC - VA 138E ROCKYMOUNT VA
2020-02-18 605-674 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - SD 162G BIGSTONECY SD
2020-02-18 608-656 0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → MCC TELEPHONY OF THE MIDWEST, LLC - WI 983F MAUSTON WI
2020-02-18 626-528 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ALHAMBRA CA
2020-02-18 647-506 not yet reported which blocks → IXICA Communications Inc. 812H Toronto —
2020-02-18 651-661 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MN 184D TWINCITIES MN
2020-02-18 661-315 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2020-02-18 757-762 0–9 XXXall 10 · 4 holders which blocks → CSC WIRELESS, LLC 425J NRFOLKZON1 VA
2020-02-18 763-326 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J TWINCITIES MN
2020-02-18 802-330 0–9 XXXall 10 · 4 holders which blocks → CSC WIRELESS, LLC 425J ST ALBANS VT
2020-02-18 848-286 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PERTHAMBOY NJ
2020-02-18 862-350 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEWARK NJ
2020-02-18 909-785 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 POMONA CA
2020-02-14 234-544 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H RAVENNA OH
2020-02-14 234-566 0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H MOGADORE OH
2020-02-14 234-599 0XXX2XXX3XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H STRASBURG OH
2020-02-14 234-688 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H WINONA OH
2020-02-14 234-758 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → FRACTEL, LLC 965H BREWSTER OH
2020-02-14 239-688 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H LEHIGHACRS FL
2020-02-14 551-336 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H HACKENSACK NJ
2020-02-14 551-345 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H HASBROKHTS NJ
2020-02-14 551-356 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H KEARNY NJ
2020-02-14 551-465 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H LEONIA NJ
2020-02-14 551-529 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H UNION CITY NJ
2020-02-14 551-758 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H JERSEYCITY NJ
2020-02-14 567-362 0XXX2XXX3XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → FRACTEL, LLC 965H BETTSVILLE OH
2020-02-14 567-465 0XXX1XXX2XXX3XXX4XXX8XXX · 5 holders which blocks → FRACTEL, LLC 965H BLOOMVILLE OH
2020-02-14 567-529 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H EDGERTON OH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/28/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.