NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026
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, all time — NPA 289
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
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2015-08-10 | 289-739 | not yet reported which blocks → | InnSysVoice Corp | 383H | Ancaster | — |
| 2015-08-10 | 289-743 | not yet reported which blocks → | InnSysVoice Corp | 383H | Binbrook | — |
| 2015-08-10 | 289-750 | not yet reported which blocks → | InnSysVoice Corp | 383H | Hamilton | — |
| 2015-08-10 | 289-751 | not yet reported which blocks → | InnSysVoice Corp | 383H | Caledonia | — |
| 2015-08-10 | 289-753 | not yet reported which blocks → | InnSysVoice Corp | 383H | Dundas | — |
| 2015-08-10 | 289-754 | not yet reported which blocks → | InnSysVoice Corp | 383H | Grimsby | — |
| 2015-08-10 | 289-784 | not yet reported which blocks → | InnSysVoice Corp | 383H | Hagersville | — |
| 2015-08-10 | 289-791 | not yet reported which blocks → | InnSysVoice Corp | 383H | Mount Hope | — |
| 2015-08-10 | 289-792 | not yet reported which blocks → | InnSysVoice Corp | 383H | Stoney Creek | — |
| 2015-08-10 | 289-793 | not yet reported which blocks → | InnSysVoice Corp | 383H | West Lincoln | — |
| 2015-08-10 | 289-794 | not yet reported which blocks → | InnSysVoice Corp | 383H | Winona | — |
| 2015-07-16 | 289-655 | not yet reported which blocks → | InnSysVoice Corp | 383H | Milton | — |
| 2015-07-16 | 289-692 | not yet reported which blocks → | InnSysVoice Corp | 383H | Campbellville | — |
| 2015-07-16 | 289-693 | not yet reported which blocks → | InnSysVoice Corp | 383H | Freelton | — |
| 2015-07-16 | 289-694 | not yet reported which blocks → | InnSysVoice Corp | 383H | Georgetown | — |
| 2015-07-16 | 289-718 | not yet reported which blocks → | InnSysVoice Corp | 383H | Waterdown | — |
| 2015-07-16 | 289-740 | not yet reported which blocks → | InnSysVoice Corp | 383H | Oakville | — |
| 2015-07-16 | 289-741 | not yet reported which blocks → | InnSysVoice Corp | 383H | Burlington | — |
| 2015-06-04 | 289-908 | not yet reported which blocks → | InnSysVoice Corp | 383H | Caledon East | — |
| 2015-06-04 | 289-916 | not yet reported which blocks → | InnSysVoice Corp | 383H | Castlemore | — |
| 2015-06-04 | 289-944 | not yet reported which blocks → | InnSysVoice Corp | 383H | Malton | — |
| 2015-06-04 | 289-945 | not yet reported which blocks → | InnSysVoice Corp | 383H | Clarkson | — |
| 2015-06-04 | 289-951 | not yet reported which blocks → | InnSysVoice Corp | 383H | Cooksville | — |
| 2015-06-04 | 289-953 | not yet reported which blocks → | InnSysVoice Corp | 383H | Port Credit | — |
| 2015-06-04 | 289-954 | not yet reported which blocks → | InnSysVoice Corp | 383H | Snelgrove | — |
| 2015-06-04 | 289-957 | not yet reported which blocks → | InnSysVoice Corp | 383H | Streetsville | — |
| 2015-06-04 | 289-967 | not yet reported which blocks → | InnSysVoice Corp | 383H | Victoria | — |
| 2015-03-18 | 289-710 | not yet reported which blocks → | InnSysVoice Corp | 383H | Orono | — |
| 2015-03-18 | 289-713 | not yet reported which blocks → | InnSysVoice Corp | 383H | Port Perry | — |
| 2015-03-18 | 289-717 | not yet reported which blocks → | InnSysVoice Corp | 383H | Whitby | — |
| 2015-03-18 | 289-744 | not yet reported which blocks → | InnSysVoice Corp | 383H | South Pickering | — |
| 2015-03-17 | 289-533 | not yet reported which blocks → | InnSysVoice Corp | 383H | Ajax-Pickering | — |
| 2015-03-17 | 289-702 | not yet reported which blocks → | InnSysVoice Corp | 383H | Blackstock | — |
| 2015-03-17 | 289-703 | not yet reported which blocks → | InnSysVoice Corp | 383H | Bowmanville | — |
| 2015-03-17 | 289-704 | not yet reported which blocks → | InnSysVoice Corp | 383H | Brooklin | — |
| 2015-03-17 | 289-706 | not yet reported which blocks → | InnSysVoice Corp | 383H | Hampton | — |
| 2015-03-17 | 289-708 | not yet reported which blocks → | InnSysVoice Corp | 383H | Newcastle | — |
| 2015-03-17 | 289-709 | not yet reported which blocks → | InnSysVoice Corp | 383H | Newtonville | — |
| 2015-03-17 | 289-712 | not yet reported which blocks → | InnSysVoice Corp | 383H | Oshawa | — |
| 2015-03-16 | 289-561 | not yet reported which blocks → | InnSysVoice Corp | 383H | Thornhill | — |
| 2015-03-16 | 289-563 | not yet reported which blocks → | InnSysVoice Corp | 383H | Unionville | — |
| 2015-03-16 | 289-564 | not yet reported which blocks → | InnSysVoice Corp | 383H | Uxbridge | — |
| 2015-03-16 | 289-641 | not yet reported which blocks → | InnSysVoice Corp | 383H | Woodbridge | — |
| 2015-03-16 | 289-699 | not yet reported which blocks → | InnSysVoice Corp | 383H | Richmond Hill | — |
| 2015-03-13 | 289-543 | not yet reported which blocks → | InnSysVoice Corp | 383H | Oak Ridges | — |
| 2015-03-13 | 289-558 | not yet reported which blocks → | InnSysVoice Corp | 383H | Stouffville | — |
| 2015-03-13 | 289-559 | not yet reported which blocks → | InnSysVoice Corp | 383H | Sutton | — |
| 2015-03-12 | 289-532 | not yet reported which blocks → | InnSysVoice Corp | 383H | Maple | — |
| 2015-03-12 | 289-534 | not yet reported which blocks → | InnSysVoice Corp | 383H | Mount Albert | — |
| 2015-03-12 | 289-535 | not yet reported which blocks → | InnSysVoice Corp | 383H | Newmarket | — |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.