NumberResearchRecent thousands-block assignments
68 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/27/2026
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
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2015-06-23 | 510-674-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | HAYWARD | CA |
| 2015-06-23 | 510-674-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | HAYWARD | CA |
| 2015-06-23 | 510-674-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | HAYWARD | CA |
| 2015-06-23 | 510-674-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | HAYWARD | CA |
| 2015-06-23 | 626-804-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | AZUSA | CA |
| 2015-06-23 | 626-804-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | AZUSA | CA |
| 2015-06-23 | 657-272-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2015-06-23 | 657-272-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2015-06-23 | 657-272-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2015-06-23 | 657-272-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2015-06-23 | 657-272-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2015-06-23 | 657-272-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2015-06-23 | 858-291-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | LA JOLLA | CA |
| 2015-06-23 | 909-462-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | S BERNDINO | CA |
| 2015-06-23 | 909-462-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | S BERNDINO | CA |
| 2015-06-23 | 909-687-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | ONTARIO | CA |
| 2015-06-23 | 909-687-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | ONTARIO | CA |
| 2015-06-22 | 209-637-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | TRACY | CA |
| 2015-06-22 | 309-621-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | PEORIA | IL |
| 2015-06-22 | 309-621-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | PEORIA | IL |
| 2015-06-22 | 309-621-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | PEORIA | IL |
| 2015-06-22 | 309-621-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | PEORIA | IL |
| 2015-06-22 | 330-391-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | MEDINA | OH |
| 2015-06-22 | 331-701-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | NAPERVILLE | IL |
| 2015-06-22 | 331-701-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | NAPERVILLE | IL |
| 2015-06-22 | 331-701-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | NAPERVILLE | IL |
| 2015-06-22 | 424-378-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | LOMITA | CA |
| 2015-06-22 | 442-257-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | ESCONDIDO | CA |
| 2015-06-22 | 510-696-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD FRTVL | CA |
| 2015-06-22 | 510-696-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD FRTVL | CA |
| 2015-06-22 | 510-696-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD FRTVL | CA |
| 2015-06-22 | 510-696-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD FRTVL | CA |
| 2015-06-22 | 510-696-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD FRTVL | CA |
| 2015-06-22 | 510-696-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD FRTVL | CA |
| 2015-06-22 | 510-696-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD FRTVL | CA |
| 2015-06-22 | 513-906-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CINCINNATI | OH |
| 2015-06-22 | 520-470-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | NOGALES | AZ |
| 2015-06-22 | 530-650-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | WOODLAND | CA |
| 2015-06-22 | 562-655-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | PICORIVERA | CA |
| 2015-06-22 | 708-940-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | HARVEY | IL |
| 2015-06-22 | 708-940-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | HARVEY | IL |
| 2015-06-22 | 708-940-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | HARVEY | IL |
| 2015-06-22 | 708-940-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | HARVEY | IL |
| 2015-06-22 | 708-940-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | HARVEY | IL |
| 2015-06-22 | 831-256-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | SALINAS | CA |
| 2015-06-22 | 831-256-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | SALINAS | CA |
| 2015-06-22 | 858-226-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | SNDG MRMS | CA |
| 2015-06-22 | 916-693-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | FOLSOM | CA |
| 2015-06-22 | 916-693-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | FOLSOM | CA |
| 2015-06-19 | 209-452-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | LODI | CA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.