NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

375 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 28
NEW CINGULAR WIRELESS PCS, LLC - IL 23
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
— 434-990 4XXX6XXX7XXX8XXX · 4 holders which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 STANARDSVL VA
— 434-992 3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 STANARDSVL VA
— 434-993 0XXX1XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → VERIZON VIRGINIA, INC. 9213 CONCORD VA
— 434-995 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 CHARLOTSVL VA
— 434-996 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 CHARLOTSVL VA
— 435-200 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 PARK CITY UT
— 435-201 5XXX6XXX7XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 RICHFIELD UT
— 435-203 6XXX7XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MTPLEASANT UT
— 435-207 not yet reported which blocks → CITIZENS TELECOM-UTAH DBA FRONTIER COMM OF UT 4429 TREMONTON UT
— 435-208 not yet reported which blocks → UT
— 435-210 1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 MOAB UT
— 435-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX UT
— 435-213 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - UT 3231 LOGAN UT
— 435-214 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - UT 3231 PARK CITY UT
— 435-215 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - UT 3231 ST GEORGE UT
— 435-216 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - UT 3231 ST GEORGE UT
— 435-220 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MOAB UT
— 435-221 1XXX4XXX6XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 BEAVER UT
— 435-229 none assigned yet which blocks → T-MOBILE USA, INC. 6529 ST GEORGE UT
— 435-230 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 BEARRIV CY UT
— 435-231 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 ENTERPRISE UT
— 435-232 0XXX5XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 LOGAN UT
— 435-234 not yet reported which blocks → BEEHIVE TELEPHONE COMPANY, INC. (UTAH) 4611 IBAPAH UT
— 435-237 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 BRIGHAM CY UT
— 435-238 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - UT 871E CEDAR CITY UT
— 435-240 1XXX3XXX8XXX · 2 holders which blocks → COMMIO, LLC 939H WENDOVER UT
— 435-241 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → T-MOBILE USA, INC. 6529 TOOELE UT
— 435-242 2XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → METROPCS, INC. 5562 GREENRIVER UT
— 435-245 1XXX8XXX · 2 holders which blocks → QWEST CORPORATION 9636 LOGAN UT
— 435-246 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - UT 871E BRIGHAM CY UT
— 435-247 not yet reported which blocks → UBTA-UBET COMMUNICATIONS, INC. DBA STRATA NETWORKS 2287 LAPOINT UT
— 435-250 0XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - UT 117F NEPHI UT
— 435-256 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - UT 871E ST GEORGE UT
— 435-257 not yet reported which blocks → CITIZENS TELECOM-UTAH DBA FRONTIER COMM OF UT 4429 TREMONTON UT
— 435-258 6XXX7XXX8XXX9XXX · 3 holders which blocks → QWEST CORPORATION 9636 LOGAN UT
— 435-259 not yet reported which blocks → CITIZENS TELECOM-UTAH DBA FRONTIER COMM OF UT 4429 MOAB UT
— 435-260 3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 MOAB UT
— 435-261 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - UT 117F BEAVER UT
— 435-267 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CEDAR CITY UT
— 435-272 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - UT 117F ST GEORGE UT
— 435-276 0XXX2XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H BLANDING UT
— 435-279 none assigned yet which blocks → CITIZENS TELECOM-UTAH DBA FRONTIER COMM OF UT 4429 BEARRIV CY UT
— 435-283 not yet reported which blocks → MANTI TEL. CO. 2282 EPHRAIM UT
— 435-285 not yet reported which blocks → CITIZENS TELECOM-UTAH DBA FRONTIER COMM OF UT 4429 THOMPSON UT
— 435-286 not yet reported which blocks → EMERY TELEPHONE DBA EMERY TELCOM 2278 CASTLEDALE UT
— 435-294 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 LOGAN UT
— 435-300 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAMAS UT
— 435-301 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 ST GEORGE UT
— 435-304 2XXX6XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 RICHFIELD UT
— 435-307 not yet reported which blocks → UT

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.