NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 26
Rogers Communications Canada Inc. (Wireless) 23
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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2003-01-02 309-491 1XXX4XXX8XXX9XXX · 2 holders which blocks → MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F MCLEAN IL
2003-01-02 309-498 0–9 XXXall 10 · 7 holders which blocks → MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F HEYWORTH IL
2003-01-02 309-499 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F LE ROY IL
2003-01-02 309-501 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 WASHINGTON IL
2003-01-02 573-202 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 ROLLA MO
2003-01-02 618-371 1XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IL 6115 TAMAROA IL
2003-01-02 618-389 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ASHLEY IL
2003-01-02 618-390 1XXX2XXX3XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WOODLAWN IL
2003-01-02 774-299 0–9 XXXwhole prefix which blocks → VERIZON NEW ENGLAND INC. 9102 TAUNTON MA
2003-01-02 843-584 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → METROPCS, INC. 5562 WALTERBORO SC
2002-12-31 256-364 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → METROPCS, INC. 5562 FORT PAYNE AL
2002-12-31 256-374 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → POWERTEL BIRMINGHAM LICENSES, INC. 7475 ATHENS AL
2002-12-31 256-388 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → POWERTEL BIRMINGHAM LICENSES, INC. 7475 ALBERTVL AL
2002-12-31 270-868 2XXX3XXX4XXX6XXX7XXX8XXX which blocks → METROPCS, INC. 5562 LEITCHFLD KY
2002-12-31 334-434 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → POWERTEL BIRMINGHAM LICENSES, INC. 7475 TROY AL
2002-12-31 334-439 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → METROPCS, INC. 5562 TUSKEGEE AL
2002-12-31 417-295 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MO 4932 LAMAR MO
2002-12-31 440-541 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LORAIN OH
2002-12-31 501-277 1XXX2XXX3XXX5XXX6XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 GREENBRIER AR
2002-12-31 616-955 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 GRAND RPDS MI
2002-12-31 662-616 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → METROPCS, INC. 5562 GREENVILLE MS
2002-12-31 662-643 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → POWERTEL MEMPHIS LICENSES, INC. 7474 CORINTH MS
2002-12-31 662-648 0XXX7XXX8XXX · 3 holders which blocks → POWERTEL MEMPHIS LICENSES, INC. 7474 STARKVILLE MS
2002-12-31 727-767 0–9 XXXall 10 · 3 holders which blocks → FRONTIER FLORIDA LLC DBA FRONTIER COMM OF FLORIDA 0328 STPETERSBG FL
2002-12-31 734-295 0–9 XXXall 10 · 4 holders which blocks → FRONTIER NORTH, INC. - MI 0695 SALINE MI
2002-12-31 850-499 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 FTWALTNBCH FL
2002-12-31 928-240 5XXX6XXX7XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 HEBER AZ
2002-12-31 928-241 5XXX7XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 HOLBROOK AZ
2002-12-31 928-242 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PINETOP AZ
2002-12-31 928-243 9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 SNOWFLAKE AZ
2002-12-31 928-245 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 SPRINGERVL AZ
2002-12-30 231-360 2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TRAVERSECY MI
2002-12-30 251-235 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 MCINTOSH AL
2002-12-30 318-485 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → METROPCS, INC. 5562 OAKDALE LA
2002-12-30 318-493 0XXX2XXX3XXX4XXX5XXX8XXX · 6 holders which blocks → ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 TALLULAH LA
2002-12-30 337-348 0XXX4XXX5XXX · 3 holders which blocks → VOICESTREAM GSM I, LLC 150C DE RIDDER LA
2002-12-30 337-423 1XXX2XXX3XXX4XXX5XXX6XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 LEESVILLE LA
2002-12-30 337-424 0XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → VOICESTREAM GSM I, LLC 150C LEESVILLE LA
2002-12-30 435-275 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - UT 3231 ST GEORGE UT
2002-12-30 435-310 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BEAVER UT
2002-12-30 502-422 4XXX5XXX6XXX · 2 holders which blocks → POWERTEL KENTUCKY LICENSES, INC. 365C TAYLORSVL KY
2002-12-30 518-752 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 GLOVERSVL NY
2002-12-30 567-278 7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BASCOM OH
2002-12-30 620-266 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KS 2240 HILLSBORO KS
2002-12-30 620-267 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KS 2240 PEABODY KS
2002-12-30 620-268 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KS 2240 STAFFORD KS
2002-12-30 620-269 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KS 2240 CEDAR VALE KS
2002-12-30 620-270 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KS 2240 CANEY KS
2002-12-30 662-671 1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 TUNICA MS
2002-12-30 845-238 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 MONROE NY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.