NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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
Rogers Communications Canada Inc. (Wireless) 23
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
2016-05-12 236-384 not yet reported which blocks → Navigata Communications Limited 078G 70 Mile House —
2016-05-12 236-385 not yet reported which blocks → Navigata Communications Limited 078G Bear Lake —
2016-05-12 236-386 not yet reported which blocks → Navigata Communications Limited 078G Burns Lake —
2016-05-12 253-257 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 TACOMAWVLY WA
2016-05-12 425-240 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 BELLEVUE WA
2016-05-12 507-703 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 WINONA MN
2016-05-12 657-327 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2016-05-12 657-328 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 SANTA ANA CA
2016-05-12 719-621 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J PUEBLO CO
2016-05-12 740-665 0XXX1XXX5XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - OH 464C GRATIOT OH
2016-05-12 873-999 not yet reported which blocks → TELUS Mobility 8303 Amos —
2016-05-12 909-413 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CHINO CA
2016-05-12 985-244 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - LA 749E KENTWOOD LA
2016-05-11 254-964 0–9 XXXall 10 · 4 holders which blocks → PATHWAY COM-TEL, INC. - TX 8253 STEPHENVL TX
2016-05-11 309-512 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J PEORIA IL
2016-05-11 346-258 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C SHELDON TX
2016-05-11 424-309 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C INGLEWOOD CA
2016-05-11 424-317 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C W ANGELES CA
2016-05-11 442-206 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - CA 649C IMPERIAL CA
2016-05-11 606-240 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - KY 896E OLIVE HILL KY
2016-05-11 619-369 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C HARBSNALPN CA
2016-05-11 639-222 not yet reported which blocks → Bell West Inc. 2933 Prince Albert —
2016-05-11 639-223 not yet reported which blocks → Bell West Inc. 2933 Moose Jaw —
2016-05-11 639-224 not yet reported which blocks → Bell West Inc. 2933 Yorkton —
2016-05-11 639-225 not yet reported which blocks → Bell West Inc. 2933 North Battleford —
2016-05-11 639-226 not yet reported which blocks → Bell West Inc. 2933 Swift Current —
2016-05-11 650-410 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C SSNFRNCSCO CA
2016-05-11 740-873 0XXX1XXX3XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - OH 464C HANOVER OH
2016-05-11 740-880 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - OH 464C GRANVILLE OH
2016-05-11 740-890 0XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - OH 464C ST LOUISVL OH
2016-05-11 747-212 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C AGOURA CA
2016-05-11 805-429 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C POINT MUGU CA
2016-05-11 873-203 not yet reported which blocks → TELUS Quebec 2243 St-Pierre-Les-Becquets —
2016-05-11 873-204 not yet reported which blocks → TELUS Quebec 2243 St-Wenceslas —
2016-05-11 909-310 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C CHINO CA
2016-05-11 909-323 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C DIAMONDBAR CA
2016-05-11 909-406 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C REDLANDS CA
2016-05-11 912-328 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 SAVANNAH GA
2016-05-11 949-577 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C IRVINE CA
2016-05-11 956-582 0XXX7XXX · 2 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J SANPERLITA TX
2016-05-11 956-671 7XXX which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J SAN ISIDRO TX
2016-05-10 442-205 0–9 XXXall 10 · 6 holders which blocks → METROPCS NETWORKS, LLC 899D YUCCA VLY CA
2016-05-10 470-307 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA NE GA
2016-05-10 470-317 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C ATLANTA SO GA
2016-05-10 531-210 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 OMAHA NE
2016-05-10 606-366 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - KY 896E EWING KY
2016-05-10 623-235 0–9 XXXall 10 · 5 holders which blocks → QWEST CORPORATION 9636 PHOENIX AZ
2016-05-10 667-458 0–9 XXXall 10 · 8 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 ANNAPOLIS MD
2016-05-10 717-356 0–9 XXXall 10 · 5 holders which blocks → VERIZON NORTH, INC. - PA 0169 YORK PA
2016-05-10 720-595 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CO 6118 DENVER CO

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.