NumberResearchRecent thousands-block assignments
9 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, last 30 days — NPA 603
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2000-05-05 | 603-383-1XXX | 1000–1999 | Assigned | PAETEC ITEL, LLC | 829J | JACKSON | NH |
| 2000-05-05 | 603-418-0XXX | 0000–0999 | Assigned | PAETEC ITEL, LLC | 829J | EXETER | NH |
| 2000-05-05 | 603-515-9XXX | 9000–9999 | Assigned | PAETEC ITEL, LLC | 829J | WOLFEBORO | NH |
| 2000-05-05 | 603-587-0XXX | 0000–0999 | Assigned | COMCAST IP PHONE, LLC | 318J | CANDIA | NH |
| 2000-05-05 | 603-612-0XXX | 0000–0999 | Assigned | PAETEC ITEL, LLC | 829J | PLAISTOW | NH |
| 2000-05-05 | 603-637-1XXX | 1000–1999 | Assigned | PAETEC ITEL, LLC | 829J | BEDFORD | NH |
| 2000-05-05 | 603-732-0XXX | 0000–0999 | Assigned | PAETEC ITEL, LLC | 829J | MILFORD | NH |
| 2000-05-05 | 603-734-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | EPPING | NH |
| 2000-05-05 | 603-822-1XXX | 1000–1999 | Assigned | PAETEC ITEL, LLC | 829J | ROCHESTER | NH |
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.