NumberResearchRecent thousands-block assignments
11 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, last 30 days — NPA 309
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 |
|---|---|---|---|---|---|---|---|
| 2006-04-25 | 309-558-6XXX | 6000–6999 | Assigned | MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | 846F | ROCKISLAND | IL |
| 2006-04-19 | 309-319-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | BLOOMINGTN | IL |
| 2006-04-17 | 309-750-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | BLOOMINGTN | IL |
| 2006-04-11 | 309-361-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | PEORIA | IL |
| 2006-04-11 | 309-361-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | PEORIA | IL |
| 2006-04-05 | 309-716-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | EASTMOLINE | IL |
| 2006-03-21 | 309-628-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | ALEDO | IL |
| 2006-03-14 | 309-550-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | PEORIA | IL |
| 2006-03-14 | 309-550-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | PEORIA | IL |
| 2006-03-01 | 309-507-6XXX | 6000–6999 | Assigned | UNITED STATES CELLULAR - IL | 6265 | GENESEO | IL |
| 2006-02-24 | 309-550-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | PEORIA | IL |
| 2006-02-14 | 309-297-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | GALESBURG | IL |
| 2006-02-08 | 309-948-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | ROCKISLAND | IL |
| 2006-02-08 | 309-948-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | ROCKISLAND | IL |
| 2006-01-19 | 309-863-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | PEORIA | IL |
| 2006-01-10 | 309-319-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | BLOOMINGTN | IL |
| 2006-01-10 | 309-740-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | PEORIA | IL |
| 2006-01-06 | 309-716-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | EASTMOLINE | IL |
| 2006-01-04 | 309-642-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | PEKIN | IL |
| 2005-12-27 | 309-798-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | ROCKISLAND | IL |
| 2005-12-16 | 309-643-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | PEORIA | IL |
| 2005-12-13 | 309-550-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | PEORIA | IL |
| 2005-12-01 | 309-489-4XXX | 4000–4999 | Assigned | MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | 846F | GENESEO | IL |
| 2005-11-14 | 309-524-1XXX | 1000–1999 | Assigned | ILLINOIS BELL TEL CO | 9329 | MOLINE | IL |
| 2005-11-11 | 309-868-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | PEORIA | IL |
| 2005-11-09 | 309-798-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | ROCKISLAND | IL |
| 2005-11-04 | 309-222-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | PEORIA | IL |
| 2005-11-04 | 309-222-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | PEORIA | IL |
| 2005-11-02 | 309-558-0XXX | 0000–0999 | Assigned | MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | 846F | ROCKISLAND | IL |
| 2005-10-12 | 309-643-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | PEORIA | IL |
| 2005-09-13 | 309-558-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | ROCKISLAND | IL |
| 2005-09-13 | 309-706-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | BLOOMINGTN | IL |
| 2005-08-30 | 309-643-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | PEORIA | IL |
| 2005-08-26 | 309-642-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | PEKIN | IL |
| 2005-08-26 | 309-648-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | PEORIA | IL |
| 2005-08-24 | 309-319-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | BLOOMINGTN | IL |
| 2005-08-24 | 309-319-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | BLOOMINGTN | IL |
| 2005-07-27 | 309-868-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | PEORIA | IL |
| 2005-07-27 | 309-868-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | PEORIA | IL |
| 2005-07-24 | 309-798-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | ROCKISLAND | IL |
| 2005-06-06 | 309-558-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | ROCKISLAND | IL |
| 2005-06-06 | 309-558-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | ROCKISLAND | IL |
| 2005-04-18 | 309-922-0XXX | 0000–0999 | Assigned | UNITED STATES CELLULAR - IL | 6265 | PEORIA | IL |
| 2005-04-18 | 309-922-2XXX | 2000–2999 | Assigned | UNITED STATES CELLULAR - IL | 6265 | PEORIA | IL |
| 2005-04-18 | 309-922-4XXX | 4000–4999 | Assigned | UNITED STATES CELLULAR - IL | 6265 | PEORIA | IL |
| 2005-04-07 | 309-643-1XXX | 1000–1999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PEORIA | IL |
| 2005-03-29 | 309-540-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | KEWANEE | IL |
| 2005-03-21 | 309-706-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | BLOOMINGTN | IL |
| 2005-03-18 | 309-329-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | ASTORIA | IL |
| 2005-03-18 | 309-784-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | VERMONT | IL |
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.