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 564
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-02-06 | 564-524-1XXX | 1000–1999 | Assigned | COMCAST IP PHONE, LLC | 318J | COPALIS | WA |
| 2023-03-17 | 564-231-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | SOUTH BEND | WA |
| 2022-08-24 | 564-223-1XXX | 1000–1999 | Assigned | COMCAST IP PHONE, LLC | 318J | HAT ISLAND | WA |
| 2022-06-17 | 564-217-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | LONGVIEW | WA |
| 2022-06-17 | 564-217-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | LONGVIEW | WA |
| 2022-06-17 | 564-777-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | CASTLEROCK | WA |
| 2022-05-02 | 564-221-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | BATTLEGRND | WA |
| 2020-08-05 | 564-240-9XXX | 9000–9999 | Assigned | COMCAST IP PHONE, LLC | 318J | SILVERDALE | WA |
| 2020-07-09 | 564-240-0XXX | 0000–0999 | Assigned | COMCAST IP PHONE, LLC | 318J | SILVERDALE | WA |
| 2019-04-02 | 564-999-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | OLYMPIA | WA |
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.