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 240
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2016-08-18 | 240-661-5XXX | 5000–5999 | Assigned | IDT AMERICA, CORP. - MD | 228C | LXTNPKGRML | MD |
| 2016-07-20 | 240-609-1XXX | 1000–1999 | Assigned | IDT AMERICA, CORP. - MD | 228C | CUMBERLAND | MD |
| 2013-01-14 | 240-309-4XXX | 4000–4999 | Assigned | IDT AMERICA, CORP. - MD | 228C | LEONARDTN | MD |
| 2009-02-03 | 240-317-5XXX | 5000–5999 | Assigned | IDT AMERICA, CORP. - MD | 228C | LXTNPKGRML | MD |
| 2007-08-30 | 240-237-8XXX | 8000–8999 | Assigned | IDT AMERICA, CORP. - MD | 228C | LXTNPKGRML | MD |
| 2007-08-30 | 240-249-6XXX | 6000–6999 | Assigned | IDT AMERICA, CORP. - MD | 228C | MECHANCSVL | MD |
| 2007-08-30 | 240-258-5XXX | 5000–5999 | Assigned | IDT AMERICA, CORP. - MD | 228C | RIDGE | MD |
| 2007-07-24 | 240-522-0XXX | 0000–0999 | Assigned | IDT AMERICA, CORP. - MD | 228C | CUMBERLAND | MD |
| 2006-09-26 | 240-362-7XXX | 7000–7999 | Assigned | IDT AMERICA, CORP. - MD | 228C | CUMBERLAND | MD |
| 2006-02-10 | 240-284-1XXX | 1000–1999 | Assigned | IDT AMERICA, CORP. - MD | 228C | FROSTBURG | MD |
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.