NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
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 518
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2019-11-21 | 518-914-1XXX | 1000–1999 | Assigned | SEAMLESS GEOPORT COMM DBA MIDDLEBURGH TELEPHONE LD | 506H | SCHENCTADY | NY |
| 2019-06-13 | 518-868-8XXX | 8000–8999 | Assigned | SEAMLESS GEOPORT COMM DBA MIDDLEBURGH TELEPHONE LD | 506H | CENTRALBDG | NY |
| 2018-10-30 | 518-279-8XXX | 8000–8999 | Assigned | SEAMLESS GEOPORT COMM DBA MIDDLEBURGH TELEPHONE LD | 506H | TROY | NY |
| 2018-06-25 | 518-239-3XXX | 3000–3999 | Assigned | SEAMLESS GEOPORT COMM DBA MIDDLEBURGH TELEPHONE LD | 506H | OAK HILL | NY |
| 2018-04-06 | 518-830-3XXX | 3000–3999 | Assigned | SEAMLESS GEOPORT COMM DBA MIDDLEBURGH TELEPHONE LD | 506H | BERNE | NY |
| 2018-04-05 | 518-787-8XXX | 8000–8999 | Assigned | SEAMLESS GEOPORT COMM DBA MIDDLEBURGH TELEPHONE LD | 506H | RAVENA | NY |
| 2018-02-05 | 518-797-2XXX | 2000–2999 | Assigned | SEAMLESS GEOPORT COMM DBA MIDDLEBURGH TELEPHONE LD | 506H | WESTERLO | NY |
| 2017-07-05 | 518-519-5XXX | 5000–5999 | Assigned | SEAMLESS GEOPORT COMM DBA MIDDLEBURGH TELEPHONE LD | 506H | RICHMONDVL | NY |
| 2017-02-10 | 518-818-5XXX | 5000–5999 | Assigned | SEAMLESS GEOPORT COMM DBA MIDDLEBURGH TELEPHONE LD | 506H | ALBANY | NY |
| 2015-05-04 | 518-517-1XXX | 1000–1999 | Assigned | SEAMLESS GEOPORT COMM DBA MIDDLEBURGH TELEPHONE LD | 506H | COBLESKILL | NY |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.