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
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2021-08-12 308-451 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CALLAWAY NE
2021-08-12 308-462 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PALISADE NE
2021-08-12 308-463 7XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TRENTON NE
2021-08-12 308-541 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OCONTO NE
2021-08-12 308-552 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HUNTLERGAN NE
2021-08-12 308-602 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CAMBRIDGE NE
2021-08-12 308-721 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ARNOLD NE
2021-08-12 337-557 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → AIRUS, INC. - LA 477H LAFAYETTE LA
2021-08-12 346-492 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
2021-08-12 346-494 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
2021-08-12 346-622 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H BAMMEL TX
2021-08-12 365-213 not yet reported which blocks → Beanfield Technologies Inc. 575G Ancaster —
2021-08-12 365-269 not yet reported which blocks → Beanfield Technologies Inc. 575G Caledonia —
2021-08-12 365-270 not yet reported which blocks → Beanfield Technologies Inc. 575G Binbrook —
2021-08-12 365-271 not yet reported which blocks → Beanfield Technologies Inc. 575G Dundas —
2021-08-12 365-272 not yet reported which blocks → Beanfield Technologies Inc. 575G Grimsby —
2021-08-12 365-273 not yet reported which blocks → Beanfield Technologies Inc. 575G Hagersville —
2021-08-12 365-274 not yet reported which blocks → Beanfield Technologies Inc. 575G Mount Hope —
2021-08-12 435-599 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H ST GEORGE UT
2021-08-12 435-699 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H PARK CITY UT
2021-08-12 445-220 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHPHSBZN39 PA
2021-08-12 445-942 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHLDLPHZN1 PA
2021-08-12 447-215 0XXX4XXX5XXX · 2 holders which blocks → ONVOY, LLC 224C WATSON IL
2021-08-12 470-913 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ATLANTA NE GA
2021-08-12 470-969 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ATLANTA SO GA
2021-08-12 475-305 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 WATERBURY CT
2021-08-12 571-518 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MANASSAS VA
2021-08-12 623-624 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2021-08-12 712-640 0XXX1XXX6XXX7XXX · 4 holders which blocks → WEBSTER-CALHOUN TELEPHONE ASSOCIATION - IA 482J LAKE CITY IA
2021-08-12 754-320 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 CORAL SPG FL
2021-08-12 909-970 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHINO CA
2021-08-12 912-591 0–9 XXXall 10 · 2 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 SAVANNAH GA
2021-08-12 920-549 0XXX4XXX8XXX · 3 holders which blocks → UNITED STATES CELLULAR - WI 6274 RANDOLPH WI
2021-08-12 940-318 0XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → PEERLESS NETWORK OF TEXAS, LLC - TX 177F WICHITAFLS TX
2021-08-12 945-209 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 GRANDPRARI TX
2021-08-11 223-280 0–9 XXXall 10 · 3 holders which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 LANCASTER PA
2021-08-11 240-791 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN4 MD
2021-08-11 240-792 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 FREDERICK MD
2021-08-11 307-376 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ALPINE WY
2021-08-11 307-395 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - WY 081F LARAMIE WY
2021-08-11 332-252 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H NWYRCYZN01 NY
2021-08-11 332-253 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NWYRCYZN01 NY
2021-08-11 339-228 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 LYNN MA
2021-08-11 346-490 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 HSTNSUBURB TX
2021-08-11 346-491 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2021-08-11 346-755 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H SUGAR LAND TX
2021-08-11 401-376 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 CUMBLND HL RI
2021-08-11 434-312 0XXX1XXX2XXX3XXX4XXX5XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F BLACKSTONE VA
2021-08-11 480-796 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHOENIX AZ
2021-08-11 534-345 6XXX which blocks → FRACTEL, LLC 965H ELDERON WI

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.