NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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. 39
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 20
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
2002-01-16 586-281 0XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7279 ROMEO MI
2002-01-16 616-237 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J ZEELAND MI
2002-01-16 616-526 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 GRAND RPDS MI
2002-01-16 616-821 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 GRAND RPDS MI
2002-01-16 631-697 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HUNTINGTON NY
2002-01-16 636-667 0XXX1XXX2XXX3XXX4XXX5XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 WASHINGTON MO
2002-01-16 661-220 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 ARVIN CA
2002-01-16 661-221 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 MOJAVE CA
2002-01-16 661-292 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 SHAFTER CA
2002-01-16 661-293 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 TAFT CA
2002-01-16 661-300 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 TEHACHAPI CA
2002-01-16 704-726 none assigned yet which blocks → SUNCOM DBA T-MOBILE USA 8645 CHARLOTTE NC
2002-01-16 804-926 0XXX2XXX3XXX · 2 holders which blocks → METROPCS, INC. 5562 PETERSBURG VA
2002-01-16 810-425 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E PT SANILAC MI
2002-01-16 810-535 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → ACD TELECOM, INC. - MI 3535 MEMPHIS MI
2002-01-16 810-618 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 FLINT MI
2002-01-16 810-857 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J ALGONAC MI
2002-01-16 831-210 6XXX7XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 SALINAS CA
2002-01-16 858-205 1XXX6XXX which blocks → T-MOBILE USA, INC. 6529 DEL MAR CA
2002-01-16 870-688 6XXX7XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HARRISON AR
2002-01-16 870-833 6XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CAMDEN AR
2002-01-16 903-387 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LONGVIEW TX
2002-01-16 915-443 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 EL PASO TX
2002-01-16 956-353 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → STPCS JOINT VENTURE, LLC 4290 ROMA TX
2002-01-15 260-387 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 FORT WAYNE IN
2002-01-15 262-354 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 OCONOMOWOC WI
2002-01-15 315-849 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 SYRACUSE NY
2002-01-15 336-736 1XXX2XXX3XXX4XXX5XXX8XXX · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 ASHEBORO NC
2002-01-15 413-262 4XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 SPRINGFLD MA
2002-01-15 469-525 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 MCKINNEY TX
2002-01-15 469-526 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 CEDAR HILL TX
2002-01-15 469-528 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 LEWISVILLE TX
2002-01-15 574-383 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 SOUTH BEND IN
2002-01-15 574-606 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ELKHART IN
2002-01-15 608-438 none assigned yet which blocks → UNITED STATES CELLULAR - WI 6274 MADISON WI
2002-01-15 720-364 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DENVER CO
2002-01-15 720-365 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DENVER CO
2002-01-15 720-366 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DENVER CO
2002-01-15 804-878 none assigned yet which blocks → METROPCS, INC. 5562 RICHMOND VA
2002-01-15 817-422 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 ARLINGTON TX
2002-01-15 817-567 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 ROANOKE TX
2002-01-15 928-446 0XXX3XXX4XXX5XXX7XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 YUMA AZ
2002-01-15 928-848 2XXX6XXX7XXX8XXX9XXX which blocks → T-MOBILE USA, INC. 6529 PRESCOTT AZ
2002-01-14 214-263 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2002-01-14 214-636 none assigned yet which blocks → METROPCS, INC. 5562 IRVING TX
2002-01-14 254-733 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 WACO TX
2002-01-14 765-543 0XXX2XXX3XXX4XXX5XXX6XXX which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LAFAYETTE IN
2002-01-14 830-421 0–9 XXXall 10 · 5 holders which blocks → STPCS JOINT VENTURE, LLC 4290 EAGLE PASS TX
2002-01-14 830-422 0XXX2XXX3XXX4XXX5XXX8XXX · 4 holders which blocks → METROPCS, INC. 5562 DEL RIO TX
2002-01-14 832-633 0XXX2XXX3XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.