NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026
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.
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2001-11-01 | 989-512 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | STANDISH | MI |
| 2001-11-01 | 989-516 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | WESTBRANCH | MI |
| 2001-11-01 | 989-563 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | ROSCOMMON | MI |
| 2001-11-01 | 989-688 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | GAYLORD | MI |
| 2001-11-01 | 989-764 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | OSCODA | MI |
| 2001-11-01 | 989-885 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | CLARE | MI |
| 2001-11-01 | 989-936 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | OWOSSO | MI |
| 2001-07-26 | 989-956 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | MTPLEASANT | MI |
| 2001-06-27 | 989-803 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | BAD AXE | MI |
| 2001-05-24 | 989-962 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | MINDENCITY | MI |
| 2001-03-26 | 989-419 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | ALPENA | MI |
| — | 989-509 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | BAY CITY | MI |
| — | 989-910 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | HOUGHTONLK | MI |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.