NumberResearchRecent thousands-block assignments
2 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 815
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 |
|---|---|---|---|---|---|---|---|
| 2003-05-12 | 815-530-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | JOLIET | IL |
| 2003-05-12 | 815-530-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | JOLIET | IL |
| 2003-05-12 | 815-671-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | JOLIET | IL |
| 2003-05-12 | 815-671-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | JOLIET | IL |
| 2003-05-09 | 815-272-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | JOLIET | IL |
| 2003-05-07 | 815-785-2XXX | 2000–2999 | Assigned | FIRST COMMUNICATIONS, LLC | 460K | WATSEKA | IL |
| 2003-05-06 | 815-212-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | JOLIET | IL |
| 2003-05-06 | 815-212-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | JOLIET | IL |
| 2003-05-06 | 815-212-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | JOLIET | IL |
| 2003-05-06 | 815-212-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | JOLIET | IL |
| 2003-05-02 | 815-566-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | BELVIDERE | IL |
| 2003-05-01 | 815-718-2XXX | 2000–2999 | Assigned | UNITED STATES CELLULAR - IL | 6265 | STERLING | IL |
| 2003-05-01 | 815-718-3XXX | 3000–3999 | Assigned | UNITED STATES CELLULAR - IL | 6265 | STERLING | IL |
| 2003-05-01 | 815-718-4XXX | 4000–4999 | Assigned | UNITED STATES CELLULAR - IL | 6265 | STERLING | IL |
| 2003-05-01 | 815-718-5XXX | 5000–5999 | Assigned | UNITED STATES CELLULAR - IL | 6265 | STERLING | IL |
| 2003-04-28 | 815-207-7XXX | 7000–7999 | Assigned | PAETEC ITEL, LLC | 829J | JOLIET | IL |
| 2003-04-18 | 815-276-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | CRYSTAL LK | IL |
| 2003-04-18 | 815-560-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | HARVARD | IL |
| 2003-04-14 | 815-994-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | DIXON | IL |
| 2003-04-14 | 815-994-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | DIXON | IL |
| 2003-04-11 | 815-614-4XXX | 4000–4999 | Assigned | ILLINOIS BELL TEL CO | 9329 | KANKAKEE | IL |
| 2003-04-11 | 815-614-6XXX | 6000–6999 | Assigned | ILLINOIS BELL TEL CO | 9329 | KANKAKEE | IL |
| 2003-04-11 | 815-614-7XXX | 7000–7999 | Assigned | ILLINOIS BELL TEL CO | 9329 | KANKAKEE | IL |
| 2003-03-26 | 815-997-1XXX | 1000–1999 | Assigned | PAETEC ITEL, LLC | 829J | ROCKFORD | IL |
| 2003-03-18 | 815-580-9XXX | 9000–9999 | Assigned | AT&T - LOCAL | 7421 | CHERRY VLY | IL |
| 2003-03-13 | 815-523-1XXX | 1000–1999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | 7136 | KANKAKEE | IL |
| 2003-03-13 | 815-523-2XXX | 2000–2999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | 7136 | KANKAKEE | IL |
| 2003-03-13 | 815-523-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | 7136 | KANKAKEE | IL |
| 2003-03-13 | 815-523-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | 7136 | KANKAKEE | IL |
| 2003-03-13 | 815-523-8XXX | 8000–8999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | 7136 | KANKAKEE | IL |
| 2003-02-07 | 815-276-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | CRYSTAL LK | IL |
| 2003-01-17 | 815-530-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | JOLIET | IL |
| 2003-01-14 | 815-212-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | JOLIET | IL |
| 2003-01-14 | 815-212-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | JOLIET | IL |
| 2002-12-12 | 815-261-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | CRYSTAL LK | IL |
| 2002-12-12 | 815-401-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | KANKAKEE | IL |
| 2002-11-20 | 815-212-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | JOLIET | IL |
| 2002-11-19 | 815-516-2XXX | 2000–2999 | Assigned | ILLINOIS BELL TEL CO | 9329 | ROCKFORD | IL |
| 2002-11-08 | 815-212-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | JOLIET | IL |
| 2002-11-08 | 815-212-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | JOLIET | IL |
| 2002-10-31 | 815-718-0XXX | 0000–0999 | Assigned | UNITED STATES CELLULAR - IL | 6265 | STERLING | IL |
| 2002-10-31 | 815-718-1XXX | 1000–1999 | Assigned | UNITED STATES CELLULAR - IL | 6265 | STERLING | IL |
| 2002-10-31 | 815-975-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | BELVIDERE | IL |
| 2002-10-25 | 815-264-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | WATERMAN | IL |
| 2002-10-25 | 815-286-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | HINCKLEY | IL |
| 2002-10-25 | 815-456-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | FRANKLIGRV | IL |
| 2002-10-25 | 815-561-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | ROCHELLE | IL |
| 2002-10-25 | 815-734-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | MT MORRIS | IL |
| 2002-10-25 | 815-827-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | MAPLE PARK | IL |
| 2002-10-09 | 815-664-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | SPRING VLY | 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.