NumberResearchRecent thousands-block assignments
12 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 531
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2015-04-02 | 531-444-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | OMAHA | NE |
| 2015-04-02 | 531-444-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | OMAHA | NE |
| 2015-04-02 | 531-444-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | OMAHA | NE |
| 2015-03-31 | 531-622-0XXX | 0000–0999 | Assigned | COMCAST IP PHONE, LLC | 318J | OMAHA | NE |
| 2015-03-31 | 531-622-1XXX | 1000–1999 | Assigned | COMCAST IP PHONE, LLC | 318J | OMAHA | NE |
| 2015-03-31 | 531-622-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | OMAHA | NE |
| 2015-03-31 | 531-622-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | OMAHA | NE |
| 2015-03-31 | 531-622-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | OMAHA | NE |
| 2015-03-31 | 531-622-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | OMAHA | NE |
| 2015-03-31 | 531-622-6XXX | 6000–6999 | Assigned | COMCAST IP PHONE, LLC | 318J | OMAHA | NE |
| 2015-03-31 | 531-622-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | OMAHA | NE |
| 2015-03-31 | 531-622-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | OMAHA | NE |
| 2015-03-31 | 531-622-9XXX | 9000–9999 | Assigned | COMCAST IP PHONE, LLC | 318J | OMAHA | NE |
| 2015-03-17 | 531-600-7XXX | 7000–7999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | OMAHA | NE |
| 2015-02-25 | 531-299-0XXX | 0000–0999 | Assigned | COMCAST IP PHONE, LLC | 318J | OMAHA | NE |
| 2015-02-25 | 531-299-1XXX | 1000–1999 | Assigned | COMCAST IP PHONE, LLC | 318J | OMAHA | NE |
| 2015-02-25 | 531-299-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | OMAHA | NE |
| 2015-02-25 | 531-299-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | OMAHA | NE |
| 2015-02-25 | 531-299-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | OMAHA | NE |
| 2015-02-25 | 531-299-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | OMAHA | NE |
| 2015-02-25 | 531-299-6XXX | 6000–6999 | Assigned | COMCAST IP PHONE, LLC | 318J | OMAHA | NE |
| 2015-02-25 | 531-299-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | OMAHA | NE |
| 2015-02-25 | 531-299-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | OMAHA | NE |
| 2015-02-25 | 531-299-9XXX | 9000–9999 | Assigned | COMCAST IP PHONE, LLC | 318J | OMAHA | NE |
| 2015-01-20 | 531-202-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | OAKLAND | NE |
| 2013-02-13 | 531-333-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | LINCOLN | NE |
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.