NumberResearch Membership · Data 09/28/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/28/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
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
2020-01-09 346-417 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHANNELVW TX
2020-01-09 360-919 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BREMERTON WA
2020-01-09 385-318 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MURRAY UT
2020-01-09 423-734 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TN 525E ROGERSVL TN
2020-01-09 425-465 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ISSAQUAH WA
2020-01-09 431-819 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Fisher Branch —
2020-01-09 484-640 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 ALLENTOWN PA
2020-01-09 641-222 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H BRITT IA
2020-01-09 719-307 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PUEBLO CO
2020-01-09 719-420 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 PUEBLO CO
2020-01-09 720-751 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 DENVER CO
2020-01-09 740-257 0–9 XXXall 10 · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 BELLAIRE OH
2020-01-09 763-306 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 TWINCITIES MN
2020-01-09 763-373 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - MN 184D TWINCITIES MN
2020-01-09 872-259 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN01 IL
2020-01-09 872-260 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN01 IL
2020-01-09 936-297 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MONTGOMERY TX
2020-01-08 249-313 not yet reported which blocks → Bell Mobility 6574 Cochrane —
2020-01-08 312-820 0–9 XXXwhole prefix which blocks → ONVOY, LLC 224C CHICGOZN01 IL
2020-01-08 343-552 not yet reported which blocks → Bell Mobility 6574 Ottawa-Hull —
2020-01-08 346-416 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 TOMBALL TX
2020-01-08 410-210 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 GLENBURNIE MD
2020-01-08 431-818 not yet reported which blocks → Fido Solutions Inc. 5643 Fisher Branch —
2020-01-08 516-703 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NASSAUZN01 NY
2020-01-08 631-308 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 BRENTWOOD NY
2020-01-08 786-742 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 MIAMI FL
2020-01-08 813-219 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 TAMPAWST FL
2020-01-08 825-733 not yet reported which blocks → Bell Mobility 6574 Calgary —
2020-01-08 872-258 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2020-01-08 873-344 not yet reported which blocks → Bell Mobility 6574 Drummondville —
2020-01-07 236-339 not yet reported which blocks → Bell Mobility 6574 Vancouver —
2020-01-07 380-213 0–9 XXXall 10 · 3 holders which blocks → TELNYX LLC 073H COLUMBUS OH
2020-01-07 431-542 not yet reported which blocks → Bell Mobility 6574 Brandon —
2020-01-07 438-433 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-01-07 571-430 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2020-01-07 623-253 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2020-01-07 769-210 0–9 XXXall 10 · 4 holders which blocks → 1ST POINT COMMUNICATIONS, LLC 489J JACKSON MS
2020-01-07 775-447 0–9 XXXall 10 · 3 holders which blocks → TELNYX LLC 073H RENO NV
2020-01-07 786-741 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 MIAMI FL
2020-01-06 320-427 1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - MN 184D BEARDSLEY MN
2020-01-06 786-739 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 MIAMI FL
2020-01-06 857-353 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BOSTON MA
2020-01-06 863-277 0–9 XXXall 10 · 3 holders which blocks → METROPCS NETWORKS, LLC 899D MULBERRY FL
2020-01-02 873-464 not yet reported which blocks → Videotron Ltd. 8306 Nantes —
2019-12-31 205-898 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AL 604E PARRISH AL
2019-12-31 205-927 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AL 604E REFORM AL
2019-12-31 236-481 not yet reported which blocks → TELUS 8086 North Vancouver —
2019-12-31 239-610 0–9 XXXwhole prefix which blocks → ONVOY, LLC - FL 937C NAPLES FL
2019-12-31 672-987 not yet reported which blocks → TELUS Mobility 8301 Cranbrook —
2019-12-31 672-988 not yet reported which blocks → TELUS Mobility 8301 Cranbrook —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/28/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.