NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, all time — NPA 217
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2021-12-14 | 217-980-3XXX | 3000–3999 | Assigned | MTC COMMUNICATIONS, INC. - IL | 342F | NAUVOO | IL |
| 2021-11-19 | 217-505-3XXX | 3000–3999 | Assigned | MTC COMMUNICATIONS, INC. - IL | 342F | WARSAW | IL |
| 2020-09-30 | 217-815-3XXX | 3000–3999 | Assigned | MTC COMMUNICATIONS, INC. - IL | 342F | NIOTA | IL |
| 2019-10-11 | 217-842-3XXX | 3000–3999 | Assigned | MTC COMMUNICATIONS, INC. - IL | 342F | BOWEN | IL |
| 2018-12-27 | 217-551-3XXX | 3000–3999 | Assigned | MTC COMMUNICATIONS, INC. - IL | 342F | HAMILTON | IL |
| 2018-12-27 | 217-845-2XXX | 2000–2999 | Assigned | MTC COMMUNICATIONS, INC. - IL | 342F | ELVASTON | IL |
| 2018-02-20 | 217-746-4XXX | 4000–4999 | Assigned | MTC COMMUNICATIONS, INC. - IL | 342F | FERRIS | IL |
| 2017-10-31 | 217-989-3XXX | 3000–3999 | Assigned | MTC COMMUNICATIONS, INC. - IL | 342F | DALLASCITY | IL |
| 2015-02-11 | 217-604-3XXX | 3000–3999 | Assigned | MTC COMMUNICATIONS, INC. - IL | 342F | CARTHAGE | IL |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.