NumberResearchRecent thousands-block assignments
12 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, last 30 days — NPA 424
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 |
|---|---|---|---|---|---|---|---|
| 2015-05-13 | 424-376-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | TORRANCE | CA |
| 2015-04-30 | 424-349-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | CMTN CMTN | CA |
| 2015-04-30 | 424-349-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CMTN CMTN | CA |
| 2015-04-29 | 424-359-0XXX | 0000–0999 | Assigned | METROPCS NETWORKS, LLC | 899D | BEVERLYHLS | CA |
| 2015-04-29 | 424-359-2XXX | 2000–2999 | Assigned | METROPCS NETWORKS, LLC | 899D | BEVERLYHLS | CA |
| 2015-04-29 | 424-396-4XXX | 4000–4999 | Assigned | METROPCS NETWORKS, LLC | 899D | CMTN GRDN | CA |
| 2015-04-28 | 424-359-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | CA |
| 2015-04-28 | 424-394-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | CA |
| 2015-04-28 | 424-394-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | CA |
| 2015-04-28 | 424-394-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | CA |
| 2015-04-28 | 424-394-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | CA |
| 2015-04-28 | 424-394-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | CA |
| 2015-04-28 | 424-394-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | CA |
| 2015-04-28 | 424-394-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | CA |
| 2015-04-27 | 424-356-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | INGLEWOOD | CA |
| 2015-04-27 | 424-387-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | SNMN SNMN | CA |
| 2015-04-24 | 424-349-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | CMTN CMTN | CA |
| 2015-04-24 | 424-349-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | CMTN CMTN | CA |
| 2015-04-24 | 424-349-2XXX | 2000–2999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | CMTN CMTN | CA |
| 2015-04-23 | 424-396-3XXX | 3000–3999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | CMTN GRDN | CA |
| 2015-04-20 | 424-384-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | SNMN MRVS | CA |
| 2015-04-20 | 424-535-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | W ANGELES | CA |
| 2015-04-17 | 424-391-1XXX | 1000–1999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | HAWTHORNE | CA |
| 2015-04-15 | 424-531-0XXX | 0000–0999 | Assigned | METROPCS NETWORKS, LLC | 899D | CMTN GRDN | CA |
| 2015-04-15 | 424-531-1XXX | 1000–1999 | Assigned | METROPCS NETWORKS, LLC | 899D | CMTN GRDN | CA |
| 2015-04-15 | 424-531-2XXX | 2000–2999 | Assigned | METROPCS NETWORKS, LLC | 899D | CMTN GRDN | CA |
| 2015-04-15 | 424-531-3XXX | 3000–3999 | Assigned | METROPCS NETWORKS, LLC | 899D | CMTN GRDN | CA |
| 2015-04-15 | 424-531-4XXX | 4000–4999 | Assigned | METROPCS NETWORKS, LLC | 899D | CMTN GRDN | CA |
| 2015-04-13 | 424-369-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | W ANGELES | CA |
| 2015-04-13 | 424-521-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | CMTN CMTN | CA |
| 2015-04-13 | 424-521-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | CMTN CMTN | CA |
| 2015-04-13 | 424-521-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | CMTN CMTN | CA |
| 2015-04-13 | 424-521-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | CMTN CMTN | CA |
| 2015-04-13 | 424-521-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | CMTN CMTN | CA |
| 2015-04-13 | 424-521-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | CMTN CMTN | CA |
| 2015-04-13 | 424-521-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CMTN CMTN | CA |
| 2015-04-13 | 424-523-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CULVERCITY | CA |
| 2015-04-10 | 424-359-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | BEVERLYHLS | CA |
| 2015-04-10 | 424-397-0XXX | 0000–0999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | EL SEGUNDO | CA |
| 2015-04-09 | 424-339-4XXX | 4000–4999 | Assigned | METROPCS NETWORKS, LLC | 899D | SAN PEDRO | CA |
| 2015-04-09 | 424-339-5XXX | 5000–5999 | Assigned | METROPCS NETWORKS, LLC | 899D | SAN PEDRO | CA |
| 2015-04-08 | 424-365-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | W ANGELES | CA |
| 2015-04-08 | 424-385-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | CULVERCITY | CA |
| 2015-04-08 | 424-385-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | CULVERCITY | CA |
| 2015-04-08 | 424-385-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | CULVERCITY | CA |
| 2015-04-08 | 424-385-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | CULVERCITY | CA |
| 2015-04-08 | 424-385-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | CULVERCITY | CA |
| 2015-04-07 | 424-393-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | INGLEWOOD | CA |
| 2015-04-06 | 424-349-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | CMTN CMTN | CA |
| 2015-04-06 | 424-378-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LOMITA | CA |
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.