NumberResearchRecent thousands-block assignments
2 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, last 30 days — NPA 815
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 |
|---|---|---|---|---|---|---|---|
| 2006-03-15 | 815-215-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | 7136 | NEW LENOX | IL |
| 2006-03-14 | 815-319-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | ROCKFORD | IL |
| 2006-03-14 | 815-319-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | ROCKFORD | IL |
| 2006-03-14 | 815-582-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | JOLIET | IL |
| 2006-02-24 | 815-409-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | JOLIET | IL |
| 2006-02-23 | 815-582-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | JOLIET | IL |
| 2006-02-23 | 815-582-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | JOLIET | IL |
| 2006-02-22 | 815-731-0XXX | 0000–0999 | Assigned | ILLINOIS BELL TEL CO | 9329 | PLAINFIELD | IL |
| 2006-02-22 | 815-731-1XXX | 1000–1999 | Assigned | ILLINOIS BELL TEL CO | 9329 | PLAINFIELD | IL |
| 2006-02-22 | 815-731-2XXX | 2000–2999 | Assigned | ILLINOIS BELL TEL CO | 9329 | PLAINFIELD | IL |
| 2006-02-22 | 815-731-3XXX | 3000–3999 | Assigned | ILLINOIS BELL TEL CO | 9329 | PLAINFIELD | IL |
| 2006-02-22 | 815-731-4XXX | 4000–4999 | Assigned | ILLINOIS BELL TEL CO | 9329 | PLAINFIELD | IL |
| 2006-02-22 | 815-731-5XXX | 5000–5999 | Assigned | ILLINOIS BELL TEL CO | 9329 | PLAINFIELD | IL |
| 2006-02-22 | 815-731-6XXX | 6000–6999 | Assigned | ILLINOIS BELL TEL CO | 9329 | PLAINFIELD | IL |
| 2006-02-22 | 815-731-7XXX | 7000–7999 | Assigned | ILLINOIS BELL TEL CO | 9329 | PLAINFIELD | IL |
| 2006-02-22 | 815-731-8XXX | 8000–8999 | Assigned | ILLINOIS BELL TEL CO | 9329 | PLAINFIELD | IL |
| 2006-02-22 | 815-731-9XXX | 9000–9999 | Assigned | ILLINOIS BELL TEL CO | 9329 | PLAINFIELD | IL |
| 2006-02-21 | 815-713-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ROCKFORD | IL |
| 2006-02-17 | 815-209-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | ROCKFORD | IL |
| 2006-02-16 | 815-867-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | PONTIAC | IL |
| 2006-02-15 | 815-290-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MINOOKA | IL |
| 2006-02-15 | 815-596-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MARENGO | IL |
| 2006-02-15 | 815-770-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | HARVARD | IL |
| 2006-02-09 | 815-721-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | ROCKFORD | IL |
| 2006-02-09 | 815-721-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | ROCKFORD | IL |
| 2006-02-08 | 815-644-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CRESCENTCY | IL |
| 2006-02-03 | 815-403-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MCHENRY | IL |
| 2006-02-03 | 815-527-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WOODSTOCK | IL |
| 2006-02-03 | 815-806-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FRANKFORT | IL |
| 2006-02-02 | 815-573-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | KANKAKEE | IL |
| 2006-02-02 | 815-893-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CRYSTAL LK | IL |
| 2006-01-19 | 815-323-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | BELVIDERE | IL |
| 2006-01-18 | 815-997-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | ROCKFORD | IL |
| 2006-01-13 | 815-788-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | CRYSTAL LK | IL |
| 2006-01-11 | 815-664-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | SPRING VLY | IL |
| 2006-01-10 | 815-508-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DE KALB | IL |
| 2006-01-10 | 815-822-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | STREATOR | IL |
| 2006-01-09 | 815-516-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | ROCKFORD | IL |
| 2006-01-09 | 815-713-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ROCKFORD | IL |
| 2006-01-06 | 815-319-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | ROCKFORD | IL |
| 2006-01-04 | 815-409-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | JOLIET | IL |
| 2006-01-04 | 815-409-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | JOLIET | IL |
| 2006-01-03 | 815-409-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | JOLIET | IL |
| 2005-12-29 | 815-230-8XXX | 8000–8999 | Assigned | ACCESS ONE, INC. - IL | 5447 | PLAINFIELD | IL |
| 2005-12-29 | 815-295-8XXX | 8000–8999 | Assigned | ACCESS ONE, INC. - IL | 5447 | KANKAKEE | IL |
| 2005-12-29 | 815-304-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | KANKAKEE | IL |
| 2005-12-29 | 815-409-4XXX | 4000–4999 | Assigned | ACCESS ONE, INC. - IL | 5447 | JOLIET | IL |
| 2005-12-29 | 815-518-1XXX | 1000–1999 | Assigned | ACCESS ONE, INC. - IL | 5447 | COAL CITY | IL |
| 2005-12-29 | 815-526-5XXX | 5000–5999 | Assigned | ACCESS ONE, INC. - IL | 5447 | CRYSTAL LK | IL |
| 2005-12-22 | 815-230-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | 7136 | PLAINFIELD | IL |
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.