NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
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 310
New assignments by month
Sep 2026
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2005-02-25 | 310-498-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BEVERLYHLS | CA |
| 2005-02-25 | 310-498-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BEVERLYHLS | CA |
| 2005-02-25 | 310-498-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BEVERLYHLS | CA |
| 2005-02-25 | 310-691-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BEVERLYHLS | CA |
| 2005-02-24 | 310-606-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | EL SEGUNDO | CA |
| 2005-02-24 | 310-606-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | EL SEGUNDO | CA |
| 2005-02-24 | 310-691-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | BEVERLYHLS | CA |
| 2005-02-23 | 310-653-0XXX | 0000–0999 | Assigned | PACIFIC BELL | 9740 | EL SEGUNDO | CA |
| 2005-02-23 | 310-653-1XXX | 1000–1999 | Assigned | PACIFIC BELL | 9740 | EL SEGUNDO | CA |
| 2005-02-23 | 310-653-2XXX | 2000–2999 | Assigned | PACIFIC BELL | 9740 | EL SEGUNDO | CA |
| 2005-02-23 | 310-653-3XXX | 3000–3999 | Assigned | PACIFIC BELL | 9740 | EL SEGUNDO | CA |
| 2005-02-23 | 310-653-4XXX | 4000–4999 | Assigned | PACIFIC BELL | 9740 | EL SEGUNDO | CA |
| 2005-02-23 | 310-653-5XXX | 5000–5999 | Assigned | PACIFIC BELL | 9740 | EL SEGUNDO | CA |
| 2005-02-23 | 310-653-6XXX | 6000–6999 | Assigned | PACIFIC BELL | 9740 | EL SEGUNDO | CA |
| 2005-02-23 | 310-653-7XXX | 7000–7999 | Assigned | PACIFIC BELL | 9740 | EL SEGUNDO | CA |
| 2005-02-23 | 310-653-8XXX | 8000–8999 | Assigned | PACIFIC BELL | 9740 | EL SEGUNDO | CA |
| 2005-02-23 | 310-653-9XXX | 9000–9999 | Assigned | PACIFIC BELL | 9740 | EL SEGUNDO | CA |
| 2005-02-22 | 310-279-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | CA |
| 2005-02-22 | 310-402-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | CA |
| 2005-02-22 | 310-561-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | TORRANCE | CA |
| 2005-02-18 | 310-622-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | W ANGELES | CA |
| 2005-02-18 | 310-694-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | W ANGELES | CA |
| 2005-02-18 | 310-889-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | W ANGELES | CA |
| 2005-02-18 | 310-893-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | W ANGELES | CA |
| 2005-02-18 | 310-987-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | SAN PEDRO | CA |
| 2005-02-16 | 310-341-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | EL SEGUNDO | CA |
| 2005-02-15 | 310-933-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | CMTN CMTN | CA |
| 2005-02-15 | 310-933-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | CMTN CMTN | CA |
| 2005-02-14 | 310-987-9XXX | 9000–9999 | Assigned | METROPCS NETWORKS, LLC | 899D | SAN PEDRO | CA |
| 2005-02-11 | 310-208-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | W ANGELES | CA |
| 2005-02-11 | 310-654-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | INGLEWOOD | CA |
| 2005-02-11 | 310-654-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | INGLEWOOD | CA |
| 2005-02-09 | 310-654-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | INGLEWOOD | CA |
| 2005-02-09 | 310-755-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | TORRANCE | CA |
| 2005-02-09 | 310-857-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNMN SNMN | CA |
| 2005-02-09 | 310-857-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNMN SNMN | CA |
| 2005-02-08 | 310-237-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | CULVERCITY | CA |
| 2005-02-08 | 310-356-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | EL SEGUNDO | CA |
| 2005-02-08 | 310-947-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | REDONDO | CA |
| 2005-02-04 | 310-356-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | EL SEGUNDO | CA |
| 2005-02-04 | 310-469-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | EL SEGUNDO | CA |
| 2005-02-03 | 310-482-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | SNMN MRVS | CA |
| 2005-02-03 | 310-601-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | BEVERLYHLS | CA |
| 2005-02-03 | 310-651-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | BEVERLYHLS | CA |
| 2005-02-01 | 310-482-2XXX | 2000–2999 | Assigned | PAETEC ITEL, LLC | 829J | SNMN MRVS | CA |
| 2005-02-01 | 310-601-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | BEVERLYHLS | CA |
| 2005-02-01 | 310-895-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | CULVERCITY | CA |
| 2005-01-28 | 310-706-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | HAWTHORNE | CA |
| 2005-01-26 | 310-209-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | W ANGELES | CA |
| 2005-01-26 | 310-654-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | INGLEWOOD | CA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.