NumberResearchRecent thousands-block assignments
1 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 773
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 |
|---|---|---|---|---|---|---|---|
| 2008-07-08 | 773-904-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | CHICGOZN04 | IL |
| 2008-07-08 | 773-904-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | CHICGOZN04 | IL |
| 2008-07-07 | 773-584-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN06 | IL |
| 2008-07-07 | 773-584-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN06 | IL |
| 2008-06-27 | 773-945-0XXX | 0000–0999 | Assigned | PEERLESS NETWORK OF ILLINOIS, LLC - IL | 063E | CHICGOZN05 | IL |
| 2008-06-27 | 773-945-1XXX | 1000–1999 | Assigned | PEERLESS NETWORK OF ILLINOIS, LLC - IL | 063E | CHICGOZN05 | IL |
| 2008-06-27 | 773-945-2XXX | 2000–2999 | Assigned | ONVOY, LLC | 224C | CHICGOZN05 | IL |
| 2008-06-27 | 773-945-3XXX | 3000–3999 | Assigned | PEERLESS NETWORK OF ILLINOIS, LLC - IL | 063E | CHICGOZN05 | IL |
| 2008-06-27 | 773-945-4XXX | 4000–4999 | Assigned | ONVOY, LLC | 224C | CHICGOZN05 | IL |
| 2008-06-27 | 773-945-5XXX | 5000–5999 | Assigned | PEERLESS NETWORK OF ILLINOIS, LLC - IL | 063E | CHICGOZN05 | IL |
| 2008-06-27 | 773-945-6XXX | 6000–6999 | Assigned | PEERLESS NETWORK OF ILLINOIS, LLC - IL | 063E | CHICGOZN05 | IL |
| 2008-06-27 | 773-945-7XXX | 7000–7999 | Assigned | ONVOY, LLC | 224C | CHICGOZN05 | IL |
| 2008-06-27 | 773-945-8XXX | 8000–8999 | Assigned | ONVOY, LLC | 224C | CHICGOZN05 | IL |
| 2008-06-27 | 773-945-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF ILLINOIS, LLC - IL | 063E | CHICGOZN05 | IL |
| 2008-06-24 | 773-893-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | CHICGOZN06 | IL |
| 2008-06-20 | 773-249-5XXX | 5000–5999 | Assigned | PAETEC ITEL, LLC | 829J | CHICGOZN11 | IL |
| 2008-06-13 | 773-951-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN03 | IL |
| 2008-06-13 | 773-951-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN03 | IL |
| 2008-06-13 | 773-951-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN03 | IL |
| 2008-06-13 | 773-951-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN03 | IL |
| 2008-06-10 | 773-961-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | CHICGOZN02 | IL |
| 2008-06-10 | 773-961-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | CHICGOZN02 | IL |
| 2008-06-03 | 773-961-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN02 | IL |
| 2008-06-03 | 773-961-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN02 | IL |
| 2008-06-03 | 773-961-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN02 | IL |
| 2008-05-19 | 773-674-0XXX | 0000–0999 | Assigned | ILLINOIS BELL TEL CO | 9329 | CHICGOZN06 | IL |
| 2008-05-19 | 773-674-1XXX | 1000–1999 | Assigned | ILLINOIS BELL TEL CO | 9329 | CHICGOZN06 | IL |
| 2008-05-19 | 773-674-2XXX | 2000–2999 | Assigned | ILLINOIS BELL TEL CO | 9329 | CHICGOZN06 | IL |
| 2008-05-19 | 773-674-3XXX | 3000–3999 | Assigned | ILLINOIS BELL TEL CO | 9329 | CHICGOZN06 | IL |
| 2008-05-19 | 773-674-4XXX | 4000–4999 | Assigned | ILLINOIS BELL TEL CO | 9329 | CHICGOZN06 | IL |
| 2008-05-19 | 773-674-5XXX | 5000–5999 | Assigned | ILLINOIS BELL TEL CO | 9329 | CHICGOZN06 | IL |
| 2008-05-19 | 773-674-6XXX | 6000–6999 | Assigned | ILLINOIS BELL TEL CO | 9329 | CHICGOZN06 | IL |
| 2008-05-19 | 773-674-7XXX | 7000–7999 | Assigned | ILLINOIS BELL TEL CO | 9329 | CHICGOZN06 | IL |
| 2008-05-19 | 773-674-8XXX | 8000–8999 | Assigned | ILLINOIS BELL TEL CO | 9329 | CHICGOZN06 | IL |
| 2008-05-19 | 773-674-9XXX | 9000–9999 | Assigned | ILLINOIS BELL TEL CO | 9329 | CHICGOZN06 | IL |
| 2008-05-19 | 773-980-2XXX | 2000–2999 | Assigned | ILLINOIS BELL TEL CO | 9329 | CHICGOZN10 | IL |
| 2008-05-16 | 773-340-5XXX | 5000–5999 | Assigned | FIRST COMMUNICATIONS, LLC | 460K | CHICGOZN08 | IL |
| 2008-05-16 | 773-672-5XXX | 5000–5999 | Assigned | FIRST COMMUNICATIONS, LLC | 460K | CHICGOZN10 | IL |
| 2008-05-15 | 773-672-6XXX | 6000–6999 | Assigned | FIRST COMMUNICATIONS, LLC | 460K | CHICGOZN10 | IL |
| 2008-05-01 | 773-424-9XXX | 9000–9999 | Assigned | FIRST COMMUNICATIONS, LLC | 460K | CHICGOZN08 | IL |
| 2008-04-22 | 773-455-5XXX | 5000–5999 | Assigned | ONVOY, LLC | 224C | CHICGOZN11 | IL |
| 2008-04-14 | 773-754-3XXX | 3000–3999 | Assigned | ONVOY, LLC | 224C | CHICGOZN02 | IL |
| 2008-04-14 | 773-754-4XXX | 4000–4999 | Assigned | ONVOY, LLC | 224C | CHICGOZN02 | IL |
| 2008-04-02 | 773-897-0XXX | 0000–0999 | Assigned | PEERLESS NETWORK OF ILLINOIS, LLC - IL | 063E | CHICGOZN02 | IL |
| 2008-04-02 | 773-897-1XXX | 1000–1999 | Assigned | ONVOY, LLC | 224C | CHICGOZN02 | IL |
| 2008-04-02 | 773-897-2XXX | 2000–2999 | Assigned | ONVOY, LLC | 224C | CHICGOZN02 | IL |
| 2008-04-02 | 773-897-3XXX | 3000–3999 | Assigned | PEERLESS NETWORK OF ILLINOIS, LLC - IL | 063E | CHICGOZN02 | IL |
| 2008-04-02 | 773-897-4XXX | 4000–4999 | Assigned | ONVOY, LLC | 224C | CHICGOZN02 | IL |
| 2008-04-02 | 773-897-5XXX | 5000–5999 | Assigned | PEERLESS NETWORK OF ILLINOIS, LLC - IL | 063E | CHICGOZN02 | IL |
| 2008-04-02 | 773-897-6XXX | 6000–6999 | Assigned | PEERLESS NETWORK OF ILLINOIS, LLC - IL | 063E | CHICGOZN02 | 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.