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
Download CSV ↓
Quick find in this area code:
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2019-01-22 931-777 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H COLUMBIA TN
2019-01-22 979-274 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BELLVILLE TX
2019-01-21 431-374 not yet reported which blocks → Bell Mobility 6574 Winnipeg —
2019-01-21 586-271 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 NEW HAVEN MI
2019-01-18 205-825 0–9 XXXall 10 · 4 holders which blocks → HD CARRIER LLC 321J BIRMINGHAM AL
2019-01-18 210-783 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 SANANTONIO TX
2019-01-18 267-806 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHPHSBZN43 PA
2019-01-18 312-900 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H CHICGOZN01 IL
2019-01-18 346-378 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 HSTNSUBURB TX
2019-01-18 417-407 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 BOLIVAR MO
2019-01-18 470-526 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ATLANTA SO GA
2019-01-18 479-999 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J MENA AR
2019-01-18 480-549 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2019-01-18 513-567 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MIDDLETOWN OH
2019-01-18 540-952 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - VA 4644 BLACKSBURG VA
2019-01-18 646-994 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NWYRCYZN01 NY
2019-01-18 669-290 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SUNNYVALE CA
2019-01-18 669-309 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 SNJS SOUTH CA
2019-01-18 804-806 0–9 XXXall 10 · 7 holders which blocks → HD CARRIER LLC 321J RICHMOND VA
2019-01-18 870-666 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H JONESBORO AR
2019-01-18 925-477 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ANTIOCH CA
2019-01-18 931-999 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H CLARKSVL TN
2019-01-17 276-888 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TERRA NOVA TELECOM INC. 145J ST CHARLES VA
2019-01-17 346-377 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LANGHAMCRK TX
2019-01-17 431-832 not yet reported which blocks → Bell West Inc. 2933 Alexander —
2019-01-17 431-833 not yet reported which blocks → Bell West Inc. 2933 Boissevain —
2019-01-17 431-834 not yet reported which blocks → Bell West Inc. 2933 Hamiota —
2019-01-17 431-835 not yet reported which blocks → Bell West Inc. 2933 Minnedosa —
2019-01-17 431-836 not yet reported which blocks → Bell West Inc. 2933 Rivers —
2019-01-17 431-837 not yet reported which blocks → Bell West Inc. 2933 Roblin —
2019-01-17 431-838 not yet reported which blocks → Bell West Inc. 2933 Strathclair —
2019-01-17 431-839 not yet reported which blocks → Bell West Inc. 2933 Virden —
2019-01-17 432-246 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TERMINAL TX
2019-01-17 469-594 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2019-01-17 469-596 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F PLANO TX
2019-01-17 470-480 0–9 XXXall 10 · 4 holders which blocks → HD CARRIER LLC 321J ATLANTA GA
2019-01-17 510-956 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E OKLD ALMD CA
2019-01-17 602-607 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2019-01-17 719-820 0–9 XXXall 10 · 4 holders which blocks → HD CARRIER LLC 321J COLORDOSPG CO
2019-01-17 980-385 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 MOUNTHOLLY NC
2019-01-16 204-306 not yet reported which blocks → Shaw Telecom Inc. 497E Winnipeg —
2019-01-16 228-999 0–9 XXXall 10 · 3 holders which blocks → TERRA NOVA TELECOM INC. 145J BILOXI MS
2019-01-16 320-999 0–9 XXXall 10 · 6 holders which blocks → TERRA NOVA TELECOM INC. 145J SANDSTONE MN
2019-01-16 332-207 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN01 NY
2019-01-16 417-410 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 BOLIVAR MO
2019-01-16 469-592 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 FRISCO TX
2019-01-16 681-999 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J MORGANTOWN WV
2019-01-16 682-283 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ARLINGTON TX
2019-01-16 716-815 0–9 XXXall 10 · 6 holders which blocks → HD CARRIER LLC 321J BUFFALO NY
2019-01-16 772-272 0–9 XXXall 10 · 3 holders which blocks → INVOXIO INCORPORATED 158H PTST LUCIE FL

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.