NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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. 38
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
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
2002-12-30 845-239 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 MIDDLETOWN NY
2002-12-30 907-978 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FAIRBANKS AK
2002-12-30 909-708 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 S BERNDINO CA
2002-12-30 985-255 0XXX4XXX which blocks → METROPCS, INC. 5562 MORGANCITY LA
2002-12-27 307-701 not yet reported which blocks → UNION TELEPHONE COMPANY 013B CHEYENNE WY
2002-12-27 307-702 not yet reported which blocks → UNION TELEPHONE COMPANY 013B CASPER WY
2002-12-27 307-703 not yet reported which blocks → UNION TELEPHONE COMPANY 013B LARAMIE WY
2002-12-27 307-704 not yet reported which blocks → UNION TELEPHONE COMPANY 013B GILLETTE WY
2002-12-27 307-706 not yet reported which blocks → UNION TELEPHONE COMPANY 013B SHERIDAN WY
2002-12-27 307-712 not yet reported which blocks → UNION TELEPHONE COMPANY 013B CODY WY
2002-12-27 307-715 not yet reported which blocks → UNION TELEPHONE COMPANY 013B TORRINGTON WY
2002-12-27 307-716 not yet reported which blocks → UNION TELEPHONE COMPANY 013B POWELL WY
2002-12-27 307-717 not yet reported which blocks → UNION TELEPHONE COMPANY 013B DOUGLAS WY
2002-12-27 307-718 not yet reported which blocks → UNION TELEPHONE COMPANY 013B WORLAND WY
2002-12-27 307-719 not yet reported which blocks → UNION TELEPHONE COMPANY 013B BUFFALO WY
2002-12-27 307-720 not yet reported which blocks → UNION TELEPHONE COMPANY 013B WHEATLAND WY
2002-12-27 307-722 not yet reported which blocks → UNION TELEPHONE COMPANY 013B THERMOPOLS WY
2002-12-27 307-731 not yet reported which blocks → UNION TELEPHONE COMPANY 013B LOVELL WY
2002-12-27 307-741 not yet reported which blocks → UNION TELEPHONE COMPANY 013B GLENROCK WY
2002-12-27 307-744 not yet reported which blocks → UNION TELEPHONE COMPANY 013B NEWCASTLE WY
2002-12-27 507-476 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MN 184D MARSHALL MN

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.