NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026
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 720
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2020-05-06 | 720-713-5XXX | 5000–5999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | LONGMONT | CO |
| 2020-03-23 | 720-664-1XXX | 1000–1999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | ALLNSPKLYN | CO |
| 2020-01-15 | 720-751-2XXX | 2000–2999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DENVER | CO |
| 2019-08-07 | 720-826-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DENVER | CO |
| 2018-02-23 | 720-571-6XXX | 6000–6999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | ALLNSPKLYN | CO |
| 2017-07-06 | 720-239-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DENVER | CO |
| 2017-07-06 | 720-356-4XXX | 4000–4999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DENVER | CO |
| 2017-07-06 | 720-510-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DENVER | CO |
| 2017-06-29 | 720-676-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DENVER | CO |
| 2017-06-21 | 720-795-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DENVER | CO |
| 2017-06-16 | 720-586-6XXX | 6000–6999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DENVER | CO |
| 2017-06-16 | 720-586-8XXX | 8000–8999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DENVER | CO |
| 2016-12-20 | 720-758-6XXX | 6000–6999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DENVER | CO |
| 2016-12-20 | 720-758-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DENVER | CO |
| 2016-12-20 | 720-758-8XXX | 8000–8999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DENVER | CO |
| 2016-12-14 | 720-453-1XXX | 1000–1999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | LONGMONT | CO |
| 2016-09-09 | 720-531-0XXX | 0000–0999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DENVER | CO |
| 2016-09-09 | 720-531-1XXX | 1000–1999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DENVER | CO |
| 2016-09-09 | 720-531-6XXX | 6000–6999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DENVER | CO |
| 2016-09-09 | 720-531-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DENVER | CO |
| 2016-09-09 | 720-531-8XXX | 8000–8999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DENVER | CO |
| 2016-09-09 | 720-531-9XXX | 9000–9999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DENVER | CO |
| 2016-03-03 | 720-925-4XXX | 4000–4999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DENVER | CO |
| 2016-02-03 | 720-728-6XXX | 6000–6999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DENVER | CO |
| 2016-02-03 | 720-728-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DENVER | CO |
| 2015-11-09 | 720-697-5XXX | 5000–5999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DENVER | CO |
| 2015-11-09 | 720-697-6XXX | 6000–6999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DENVER | CO |
| 2015-11-09 | 720-697-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DENVER | CO |
| 2015-05-12 | 720-598-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DENVER | CO |
| 2015-05-12 | 720-709-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DENVER | CO |
| 2015-05-04 | 720-745-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | LONGMONT | CO |
| 2015-05-04 | 720-778-5XXX | 5000–5999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DENVER | CO |
| 2015-04-20 | 720-707-4XXX | 4000–4999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DENVER | CO |
| 2015-04-20 | 720-717-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DENVER | CO |
| 2014-04-28 | 720-580-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | KEENESBURG | CO |
| 2014-04-28 | 720-613-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | HUDSON | CO |
| 2014-04-25 | 720-414-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | ALLNSPKLYN | CO |
| 2014-04-25 | 720-463-6XXX | 6000–6999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DECKERS | CO |
| 2014-04-25 | 720-619-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | GEORGETOWN | CO |
| 2014-04-25 | 720-683-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | FORTLUPTON | CO |
| 2010-05-24 | 720-722-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DENVER | CO |
| 2008-06-02 | 720-345-5XXX | 5000–5999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DENVER | CO |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.