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
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2010-02-03 | 773-270-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | CHICGOZN04 | IL |
| 2010-02-03 | 773-669-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | CHICGOZN05 | IL |
| 2010-02-03 | 773-669-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | CHICGOZN05 | IL |
| 2010-02-03 | 773-669-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | CHICGOZN05 | IL |
| 2010-02-03 | 773-669-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | CHICGOZN05 | IL |
| 2010-02-03 | 773-850-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | CHICGOZN03 | IL |
| 2010-02-03 | 773-850-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | CHICGOZN03 | IL |
| 2010-02-03 | 773-850-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | CHICGOZN03 | IL |
| 2010-02-02 | 773-249-8XXX | 8000–8999 | Assigned | ONVOY, LLC | 224C | CHICGOZN11 | IL |
| 2010-02-02 | 773-717-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | CHICGOZN07 | IL |
| 2010-02-02 | 773-819-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | CHICGOZN07 | IL |
| 2010-01-27 | 773-217-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | CHICGOZN09 | IL |
| 2010-01-27 | 773-234-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | CHICGOZN06 | IL |
| 2010-01-27 | 773-234-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | CHICGOZN06 | IL |
| 2010-01-27 | 773-309-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | CHICGOZN05 | IL |
| 2010-01-27 | 773-340-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | CHICGOZN08 | IL |
| 2010-01-27 | 773-340-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | CHICGOZN08 | IL |
| 2010-01-27 | 773-413-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | CHICGOZN05 | IL |
| 2010-01-27 | 773-609-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | CHICGOZN10 | IL |
| 2010-01-26 | 773-800-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | CHICGOZN02 | IL |
| 2010-01-26 | 773-800-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | CHICGOZN02 | IL |
| 2010-01-26 | 773-800-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | CHICGOZN02 | IL |
| 2010-01-25 | 773-321-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | CHICGOZN06 | IL |
| 2010-01-21 | 773-226-8XXX | 8000–8999 | Assigned | PEERLESS NETWORK OF ILLINOIS, LLC - IL | 063E | CHICGOZN10 | IL |
| 2009-12-23 | 773-217-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CHICGOZN09 | IL |
| 2009-11-24 | 773-236-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN07 | IL |
| 2009-11-24 | 773-236-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN07 | IL |
| 2009-11-24 | 773-236-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN07 | IL |
| 2009-11-24 | 773-236-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN07 | IL |
| 2009-11-17 | 773-225-3XXX | 3000–3999 | Assigned | PAETEC ITEL, LLC | 829J | CHICGOZN03 | IL |
| 2009-11-13 | 773-273-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | CHICGOZN02 | IL |
| 2009-11-03 | 773-831-1XXX | 1000–1999 | Assigned | PAETEC ITEL, LLC | 829J | CHICGOZN11 | IL |
| 2009-10-26 | 773-800-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN02 | IL |
| 2009-10-26 | 773-800-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN02 | IL |
| 2009-10-26 | 773-800-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN02 | IL |
| 2009-10-21 | 773-217-1XXX | 1000–1999 | Assigned | PAETEC ITEL, LLC | 829J | CHICGOZN09 | IL |
| 2009-10-15 | 773-498-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | CHICGOZN08 | IL |
| 2009-10-08 | 773-887-7XXX | 7000–7999 | Assigned | PAETEC ITEL, LLC | 829J | CHICGOZN05 | IL |
| 2009-10-08 | 773-940-3XXX | 3000–3999 | Assigned | PAETEC ITEL, LLC | 829J | CHICGOZN06 | IL |
| 2009-10-08 | 773-982-2XXX | 2000–2999 | Assigned | PAETEC ITEL, LLC | 829J | CHICGOZN10 | IL |
| 2009-10-06 | 773-362-7XXX | 7000–7999 | Assigned | PAETEC ITEL, LLC | 829J | CHICGOZN08 | IL |
| 2009-10-06 | 773-554-3XXX | 3000–3999 | Assigned | PAETEC ITEL, LLC | 829J | CHICGOZN03 | IL |
| 2009-10-06 | 773-654-4XXX | 4000–4999 | Assigned | PAETEC ITEL, LLC | 829J | CHICGOZN02 | IL |
| 2009-10-06 | 773-747-4XXX | 4000–4999 | Assigned | PAETEC ITEL, LLC | 829J | CHICGOZN04 | IL |
| 2009-10-06 | 773-819-1XXX | 1000–1999 | Assigned | PAETEC ITEL, LLC | 829J | CHICGOZN07 | IL |
| 2009-09-29 | 773-280-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN06 | IL |
| 2009-09-29 | 773-280-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN06 | IL |
| 2009-09-29 | 773-280-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN06 | IL |
| 2009-09-29 | 773-280-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN06 | IL |
| 2009-09-29 | 773-280-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN06 | 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.