NumberResearchRecent thousands-block assignments
9 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 872
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 |
|---|---|---|---|---|---|---|---|
| 2015-05-19 | 872-281-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN06 | IL |
| 2015-05-19 | 872-281-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN06 | IL |
| 2015-05-19 | 872-281-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN06 | IL |
| 2015-05-19 | 872-281-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN06 | IL |
| 2015-05-12 | 872-713-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF ILLINOIS, LLC - IL | 063E | CHICGOZN04 | IL |
| 2015-05-08 | 872-713-5XXX | 5000–5999 | Assigned | ONVOY, LLC | 224C | CHICGOZN04 | IL |
| 2015-05-06 | 872-814-5XXX | 5000–5999 | Assigned | ONVOY, LLC | 224C | CHICGOZN04 | IL |
| 2015-05-06 | 872-817-6XXX | 6000–6999 | Assigned | ONVOY, LLC | 224C | CHICGOZN04 | IL |
| 2015-05-06 | 872-817-8XXX | 8000–8999 | Assigned | ONVOY, LLC | 224C | CHICGOZN04 | IL |
| 2015-05-04 | 872-242-3XXX | 3000–3999 | Assigned | LEVEL 3 TELECOM OF ILLINOIS, LLC - IL | 138G | CHICGOZN04 | IL |
| 2015-05-01 | 872-302-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | CHICGOZN02 | IL |
| 2015-04-17 | 872-469-1XXX | 1000–1999 | Assigned | FIRST COMMUNICATIONS, LLC | 460K | CHICGOZN03 | IL |
| 2015-04-06 | 872-302-8XXX | 8000–8999 | Assigned | PEERLESS NETWORK OF ILLINOIS, LLC - IL | 063E | CHICGOZN02 | IL |
| 2015-03-30 | 872-813-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF ILLINOIS, LLC - IL | 063E | CHICGOZN05 | IL |
| 2015-03-30 | 872-903-2XXX | 2000–2999 | Assigned | LEVEL 3 TELECOM OF ILLINOIS, LLC - IL | 138G | CHICGOZN09 | IL |
| 2015-03-27 | 872-302-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN02 | IL |
| 2015-03-27 | 872-302-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN02 | IL |
| 2015-03-27 | 872-985-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN02 | IL |
| 2015-03-27 | 872-985-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN02 | IL |
| 2015-03-27 | 872-985-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN02 | IL |
| 2015-03-27 | 872-985-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN02 | IL |
| 2015-03-27 | 872-985-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN02 | IL |
| 2015-03-27 | 872-985-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN02 | IL |
| 2015-03-27 | 872-985-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN02 | IL |
| 2015-03-27 | 872-985-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN02 | IL |
| 2015-03-24 | 872-985-0XXX | 0000–0999 | Assigned | ONVOY, LLC | 224C | CHICGOZN02 | IL |
| 2015-03-17 | 872-302-0XXX | 0000–0999 | Assigned | ONVOY, LLC | 224C | CHICGOZN02 | IL |
| 2015-03-17 | 872-302-1XXX | 1000–1999 | Assigned | ONVOY, LLC | 224C | CHICGOZN02 | IL |
| 2015-03-17 | 872-302-2XXX | 2000–2999 | Assigned | ONVOY, LLC | 224C | CHICGOZN02 | IL |
| 2015-03-10 | 872-817-3XXX | 3000–3999 | Assigned | ONVOY, LLC | 224C | CHICGOZN04 | IL |
| 2015-03-10 | 872-817-4XXX | 4000–4999 | Assigned | ONVOY, LLC | 224C | CHICGOZN04 | IL |
| 2015-03-10 | 872-817-5XXX | 5000–5999 | Assigned | ONVOY, LLC | 224C | CHICGOZN04 | IL |
| 2015-02-24 | 872-267-8XXX | 8000–8999 | Assigned | LEVEL 3 TELECOM OF ILLINOIS, LLC - IL | 138G | CHICGOZN08 | IL |
| 2015-02-17 | 872-985-2XXX | 2000–2999 | Assigned | LEVEL 3 TELECOM OF ILLINOIS, LLC - IL | 138G | CHICGOZN02 | IL |
| 2015-02-10 | 872-469-2XXX | 2000–2999 | Assigned | LEVEL 3 TELECOM OF ILLINOIS, LLC - IL | 138G | CHICGOZN03 | IL |
| 2015-02-10 | 872-901-4XXX | 4000–4999 | Assigned | LEVEL 3 TELECOM OF ILLINOIS, LLC - IL | 138G | CHICGOZN07 | IL |
| 2015-01-21 | 872-241-9XXX | 9000–9999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CHICGOZN02 | IL |
| 2015-01-21 | 872-817-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CHICGOZN04 | IL |
| 2015-01-20 | 872-241-0XXX | 0000–0999 | Assigned | ONVOY, LLC | 224C | CHICGOZN02 | IL |
| 2015-01-20 | 872-241-3XXX | 3000–3999 | Assigned | ONVOY, LLC | 224C | CHICGOZN02 | IL |
| 2015-01-20 | 872-241-5XXX | 5000–5999 | Assigned | ONVOY, LLC | 224C | CHICGOZN02 | IL |
| 2015-01-20 | 872-241-8XXX | 8000–8999 | Assigned | FIRST COMMUNICATIONS, LLC | 460K | CHICGOZN02 | IL |
| 2015-01-20 | 872-731-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN07 | IL |
| 2015-01-20 | 872-731-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN07 | IL |
| 2015-01-20 | 872-731-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN07 | IL |
| 2015-01-20 | 872-731-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN07 | IL |
| 2015-01-20 | 872-731-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN07 | IL |
| 2015-01-20 | 872-731-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN07 | IL |
| 2014-12-22 | 872-228-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | CHICGOZN09 | IL |
| 2014-12-22 | 872-267-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | CHICGOZN08 | 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.