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 657
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 |
|---|---|---|---|---|---|---|---|
| 2020-07-08 | 657-213-9XXX | 9000–9999 | Assigned | METROPCS NETWORKS, LLC | 899D | CYPRESS | CA |
| 2020-05-22 | 657-373-4XXX | 4000–4999 | Assigned | METROPCS NETWORKS, LLC | 899D | PLACENTIA | CA |
| 2020-02-13 | 657-422-8XXX | 8000–8999 | Assigned | METROPCS NETWORKS, LLC | 899D | SANTA ANA | CA |
| 2020-01-02 | 657-397-1XXX | 1000–1999 | Assigned | METROPCS NETWORKS, LLC | 899D | SANTA ANA | CA |
| 2020-01-02 | 657-397-2XXX | 2000–2999 | Assigned | METROPCS NETWORKS, LLC | 899D | SANTA ANA | CA |
| 2020-01-02 | 657-397-3XXX | 3000–3999 | Assigned | METROPCS NETWORKS, LLC | 899D | SANTA ANA | CA |
| 2019-12-13 | 657-397-4XXX | 4000–4999 | Assigned | METROPCS NETWORKS, LLC | 899D | SANTA ANA | CA |
| 2019-12-13 | 657-397-5XXX | 5000–5999 | Assigned | METROPCS NETWORKS, LLC | 899D | SANTA ANA | CA |
| 2019-12-13 | 657-397-6XXX | 6000–6999 | Assigned | METROPCS NETWORKS, LLC | 899D | SANTA ANA | CA |
| 2019-01-11 | 657-267-9XXX | 9000–9999 | Assigned | METROPCS NETWORKS, LLC | 899D | SANTA ANA | CA |
| 2019-01-11 | 657-356-4XXX | 4000–4999 | Assigned | METROPCS NETWORKS, LLC | 899D | SANTA ANA | CA |
| 2018-10-11 | 657-201-6XXX | 6000–6999 | Assigned | METROPCS NETWORKS, LLC | 899D | ANAHEIM | CA |
| 2018-10-11 | 657-340-8XXX | 8000–8999 | Assigned | METROPCS NETWORKS, LLC | 899D | WESTMINSTR | CA |
| 2018-10-11 | 657-900-9XXX | 9000–9999 | Assigned | METROPCS NETWORKS, LLC | 899D | SANTA ANA | CA |
| 2018-08-28 | 657-261-0XXX | 0000–0999 | Assigned | METROPCS NETWORKS, LLC | 899D | SANTA ANA | CA |
| 2018-08-28 | 657-357-1XXX | 1000–1999 | Assigned | METROPCS NETWORKS, LLC | 899D | SANTA ANA | CA |
| 2018-08-28 | 657-357-8XXX | 8000–8999 | Assigned | METROPCS NETWORKS, LLC | 899D | SANTA ANA | CA |
| 2018-08-28 | 657-357-9XXX | 9000–9999 | Assigned | METROPCS NETWORKS, LLC | 899D | SANTA ANA | CA |
| 2018-05-07 | 657-354-4XXX | 4000–4999 | Assigned | METROPCS NETWORKS, LLC | 899D | FULLERTON | CA |
| 2018-04-11 | 657-315-8XXX | 8000–8999 | Assigned | METROPCS NETWORKS, LLC | 899D | PLACENTIA | CA |
| 2018-03-29 | 657-319-9XXX | 9000–9999 | Assigned | METROPCS NETWORKS, LLC | 899D | FULLERTON | CA |
| 2018-03-28 | 657-340-7XXX | 7000–7999 | Assigned | METROPCS NETWORKS, LLC | 899D | WESTMINSTR | CA |
| 2018-03-27 | 657-354-5XXX | 5000–5999 | Assigned | METROPCS NETWORKS, LLC | 899D | FULLERTON | CA |
| 2018-03-27 | 657-354-6XXX | 6000–6999 | Assigned | METROPCS NETWORKS, LLC | 899D | FULLERTON | CA |
| 2017-09-20 | 657-364-7XXX | 7000–7999 | Assigned | METROPCS NETWORKS, LLC | 899D | WESTMINSTR | CA |
| 2017-07-27 | 657-358-8XXX | 8000–8999 | Assigned | METROPCS NETWORKS, LLC | 899D | SANTA ANA | CA |
| 2017-07-27 | 657-358-9XXX | 9000–9999 | Assigned | METROPCS NETWORKS, LLC | 899D | SANTA ANA | CA |
| 2017-07-26 | 657-276-8XXX | 8000–8999 | Assigned | METROPCS NETWORKS, LLC | 899D | ANAHEIM | CA |
| 2017-07-19 | 657-354-8XXX | 8000–8999 | Assigned | METROPCS NETWORKS, LLC | 899D | FULLERTON | CA |
| 2017-05-22 | 657-358-2XXX | 2000–2999 | Assigned | METROPCS NETWORKS, LLC | 899D | SANTA ANA | CA |
| 2017-04-21 | 657-354-9XXX | 9000–9999 | Assigned | METROPCS NETWORKS, LLC | 899D | FULLERTON | CA |
| 2016-12-07 | 657-318-9XXX | 9000–9999 | Assigned | METROPCS NETWORKS, LLC | 899D | WESTMINSTR | CA |
| 2016-09-27 | 657-346-1XXX | 1000–1999 | Assigned | METROPCS NETWORKS, LLC | 899D | SANTA ANA | CA |
| 2015-11-11 | 657-445-0XXX | 0000–0999 | Assigned | METROPCS NETWORKS, LLC | 899D | FULLERTON | CA |
| 2015-05-05 | 657-273-0XXX | 0000–0999 | Assigned | METROPCS NETWORKS, LLC | 899D | SANTA ANA | CA |
| 2015-05-05 | 657-273-1XXX | 1000–1999 | Assigned | METROPCS NETWORKS, LLC | 899D | SANTA ANA | CA |
| 2015-05-05 | 657-273-2XXX | 2000–2999 | Assigned | METROPCS NETWORKS, LLC | 899D | SANTA ANA | CA |
| 2015-05-05 | 657-273-3XXX | 3000–3999 | Assigned | METROPCS NETWORKS, LLC | 899D | SANTA ANA | CA |
| 2015-04-29 | 657-699-9XXX | 9000–9999 | Assigned | METROPCS NETWORKS, LLC | 899D | SANTA ANA | CA |
| 2015-01-09 | 657-263-0XXX | 0000–0999 | Assigned | METROPCS NETWORKS, LLC | 899D | GARDEN GRV | CA |
| 2015-01-09 | 657-263-9XXX | 9000–9999 | Assigned | METROPCS NETWORKS, LLC | 899D | GARDEN GRV | CA |
| 2014-12-26 | 657-262-0XXX | 0000–0999 | Assigned | METROPCS NETWORKS, LLC | 899D | ANAHEIM | CA |
| 2014-12-26 | 657-262-9XXX | 9000–9999 | Assigned | METROPCS NETWORKS, LLC | 899D | ANAHEIM | CA |
| 2014-12-22 | 657-254-2XXX | 2000–2999 | Assigned | METROPCS NETWORKS, LLC | 899D | ANAHEIM | CA |
| 2014-12-16 | 657-239-1XXX | 1000–1999 | Assigned | METROPCS NETWORKS, LLC | 899D | BUENA PARK | CA |
| 2014-12-16 | 657-254-1XXX | 1000–1999 | Assigned | METROPCS NETWORKS, LLC | 899D | ANAHEIM | CA |
| 2014-12-05 | 657-261-1XXX | 1000–1999 | Assigned | METROPCS NETWORKS, LLC | 899D | SANTA ANA | CA |
| 2014-08-29 | 657-238-4XXX | 4000–4999 | Assigned | METROPCS NETWORKS, LLC | 899D | CYPRESS | CA |
| 2012-07-30 | 657-378-5XXX | 5000–5999 | Assigned | METROPCS NETWORKS, LLC | 899D | FULLERTON | CA |
| 2012-06-20 | 657-216-4XXX | 4000–4999 | Assigned | METROPCS NETWORKS, LLC | 899D | PLACENTIA | CA |
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.