NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 27
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Oct 2026 Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2019-04-08 580-643 0XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 ALTUS OK
2019-04-08 689-777 0–9 XXXwhole prefix which blocks → TERRA NOVA TELECOM, INC. - FL 382G WINTERPARK FL
2019-04-08 689-888 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → TERRA NOVA TELECOM, INC. - FL 382G KENANSVL FL
2019-04-08 936-290 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CONROE TX
2019-04-08 941-263 0–9 XXXall 10 · 6 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 SARASOTA FL
2019-04-05 319-600 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H IOWA CITY IA
2019-04-05 409-248 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 PORTARTHUR TX
2019-04-05 551-298 0–9 XXXall 10 · 3 holders which blocks → CSC WIRELESS, LLC 425J JERSEYCITY NJ
2019-04-04 351-212 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 DANVERS MA
2019-04-04 424-428 0–9 XXXall 10 · 8 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SNMN MRVS CA
2019-04-04 539-216 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 CHECOTAH OK
2019-04-04 539-231 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 DEWEY OK
2019-04-04 539-269 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 EUFAULA OK
2019-04-04 580-644 1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 ELK CITY OK
2019-04-04 626-505 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 AZUSA CA
2019-04-04 873-648 not yet reported which blocks → Videotron Ltd. 328F Ste-Agathe —
2019-04-04 873-649 not yet reported which blocks → Videotron Ltd. 328F Ste-Agathe —
2019-04-04 979-969 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H BRYAN TX
2019-04-03 206-562 0–9 XXXwhole prefix which blocks → IP HORIZON LLC 515J SEATTLE WA
2019-04-03 207-977 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 SANFORD ME
2019-04-03 516-709 0–9 XXXall 10 · 2 holders which blocks → CSC WIRELESS, LLC 425J NASSAUZN04 NY
2019-04-03 551-302 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 HACKENSACK NJ
2019-04-03 804-849 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F LADYSMITH VA
2019-04-03 979-288 0–9 XXXall 10 · 2 holders which blocks → EDGETEL, LLC 179J ANGLETON TX
2019-04-02 236-378 not yet reported which blocks → TELUS 8086 100 Mile House —
2019-04-02 249-212 not yet reported which blocks → TELUS Integrated Communications 2782 Lefroy —
2019-04-02 343-240 not yet reported which blocks → TELUS Integrated Communications 2782 Carp —
2019-04-02 343-252 not yet reported which blocks → TELUS Integrated Communications 2782 Seeleys Bay —
2019-04-02 343-253 not yet reported which blocks → TELUS Integrated Communications 2782 Coe Hill —
2019-04-02 539-228 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CSC WIRELESS, LLC 425J GROVE OK
2019-04-02 580-414 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → CSC WIRELESS, LLC 425J WEATHERFD OK
2019-04-02 825-359 not yet reported which blocks → Bell West Inc. 2933 Rocky Mountain House —
2019-04-02 838-209 0XXX1XXX2XXX8XXX9XXX · 3 holders which blocks → VALSTAR, INC. - NY 9073 CLAVERACK NY
2019-04-02 907-606 0XXX1XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS 6563 WILLOW AK
2019-04-02 909-712 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 REDLANDS CA
2019-04-01 207-559 0XXX1XXX2XXX5XXX6XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - ME 882G LINCOLN ME
2019-04-01 325-273 0–9 XXXall 10 · 5 holders which blocks → CSC WIRELESS, LLC 425J SWEETWATER TX
2019-04-01 361-363 0–9 XXXall 10 · 4 holders which blocks → CSC WIRELESS, LLC 425J VICTORIA TX
2019-04-01 430-271 0–9 XXXall 10 · 6 holders which blocks → CSC WIRELESS, LLC 425J GLADEWATER TX
2019-04-01 432-256 0–9 XXXall 10 · 5 holders which blocks → CSC WIRELESS, LLC 425J MIDLAND TX
2019-04-01 469-722 0–9 XXXall 10 · 4 holders which blocks → CSC WIRELESS, LLC 425J DALLAS TX
2019-04-01 506-890 not yet reported which blocks → TELUS Mobility 8303 Tracadie —
2019-04-01 512-884 0–9 XXXall 10 · 5 holders which blocks → CSC WIRELESS, LLC 425J AUSTIN TX
2019-04-01 530-606 0–9 XXXall 10 · 5 holders which blocks → CSC WIRELESS, LLC 425J TRUCKEE CA
2019-04-01 707-719 0–9 XXXall 10 · 5 holders which blocks → CSC WIRELESS, LLC 425J BLUE LAKE CA
2019-04-01 806-646 0–9 XXXall 10 · 2 holders which blocks → CSC WIRELESS, LLC 425J AMARILLO TX
2019-04-01 806-705 0–9 XXXall 10 · 4 holders which blocks → CSC WIRELESS, LLC 425J LUBBOCK TX
2019-04-01 873-355 not yet reported which blocks → Bell Mobility 6574 Ottawa-Hull —
2019-04-01 979-290 0–9 XXXall 10 · 4 holders which blocks → CSC WIRELESS, LLC 425J BRENHAM TX
2019-03-29 380-205 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 NEW ALBANY OH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.