NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/23/2026
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 510
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
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Dec 2025
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2023-06-28 | 510-389-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | OKLD TRNID | CA |
| 2021-05-28 | 510-869-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | OKLD MN-PD | CA |
| 2021-01-29 | 510-971-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | OKLD MN-PD | CA |
| 2020-12-23 | 510-971-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | OKLD MN-PD | CA |
| 2020-12-23 | 510-971-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | OKLD MN-PD | CA |
| 2020-12-23 | 510-971-8XXX | 8000–8999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | OKLD MN-PD | CA |
| 2020-12-23 | 510-971-9XXX | 9000–9999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | OKLD MN-PD | CA |
| 2020-08-12 | 510-992-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | OKLD MN-PD | CA |
| 2020-06-17 | 510-419-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | OKLD MN-PD | CA |
| 2018-10-19 | 510-627-9XXX | 9000–9999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | OKLD MN-PD | CA |
| 2017-11-09 | 510-602-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | FRNK MAIN | CA |
| 2017-11-09 | 510-602-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | FRNK MAIN | CA |
| 2017-11-09 | 510-602-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | FRNK MAIN | CA |
| 2017-05-18 | 510-890-2XXX | 2000–2999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | RICHMOND | CA |
| 2016-10-26 | 510-817-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | OKLD MN-PD | CA |
| 2016-08-17 | 510-626-2XXX | 2000–2999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | OKLD TRNID | CA |
| 2016-03-21 | 510-369-8XXX | 8000–8999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | RICHMOND | CA |
| 2016-02-26 | 510-319-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | FRNK OLIVR | CA |
| 2016-02-22 | 510-907-2XXX | 2000–2999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | OKLD MN-PD | CA |
| 2015-10-28 | 510-946-8XXX | 8000–8999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | FRNK OLIVR | CA |
| 2015-09-09 | 510-946-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | FRNK OLIVR | CA |
| 2015-09-01 | 510-946-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | FRNK OLIVR | CA |
| 2015-09-01 | 510-946-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | FRNK OLIVR | CA |
| 2015-09-01 | 510-946-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | FRNK OLIVR | CA |
| 2015-06-01 | 510-623-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | FRNK OLIVR | CA |
| 2015-05-04 | 510-361-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | HAYWARD | CA |
| 2015-04-03 | 510-907-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | OKLD MN-PD | CA |
| 2015-03-02 | 510-897-0XXX | 0000–0999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | FRNK OLIVR | CA |
| 2014-12-01 | 510-942-2XXX | 2000–2999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | RICHMOND | CA |
| 2014-12-01 | 510-942-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | RICHMOND | CA |
| 2014-12-01 | 510-942-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | RICHMOND | CA |
| 2014-05-08 | 510-897-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | FRNK OLIVR | CA |
| 2014-01-16 | 510-404-2XXX | 2000–2999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | FRNK GRNLF | CA |
| 2012-08-16 | 510-255-8XXX | 8000–8999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | RICHMOND | CA |
| 2011-08-16 | 510-244-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | HAYWARD | CA |
| 2009-12-30 | 510-394-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | OKLD TRNID | CA |
| 2008-01-30 | 510-854-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | ELSBR-PINL | CA |
| 2002-10-02 | 510-275-2XXX | 2000–2999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | ELSBR-PINL | CA |
| 2001-09-07 | 510-343-8XXX | 8000–8999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | OKLD TRNID | CA |
| 2001-07-04 | 510-637-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | OKLD MN-PD | CA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.