NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026
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, all time — NPA 773
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2016-09-20 | 773-455-2XXX | 2000–2999 | Assigned | ACCESS ONE, INC. - IL | 5447 | CHICGOZN11 | IL |
| 2013-08-29 | 773-798-5XXX | 5000–5999 | Assigned | ACCESS ONE, INC. - IL | 5447 | CHICGOZN07 | IL |
| 2013-08-29 | 773-887-8XXX | 8000–8999 | Assigned | ACCESS ONE, INC. - IL | 5447 | CHICGOZN05 | IL |
| 2012-01-03 | 773-739-5XXX | 5000–5999 | Assigned | ACCESS ONE, INC. - IL | 5447 | CHICGOZN02 | IL |
| 2010-08-26 | 773-328-1XXX | 1000–1999 | Assigned | ACCESS ONE, INC. - IL | 5447 | CHICGOZN04 | IL |
| 2008-10-08 | 773-969-5XXX | 5000–5999 | Assigned | ACCESS ONE, INC. - IL | 5447 | CHICGOZN04 | IL |
| 2007-08-27 | 773-893-4XXX | 4000–4999 | Assigned | ACCESS ONE, INC. - IL | 5447 | CHICGOZN06 | IL |
| 2005-12-13 | 773-242-2XXX | 2000–2999 | Assigned | ACCESS ONE, INC. - IL | 5447 | CHICGOZN06 | IL |
| 2005-12-13 | 773-250-5XXX | 5000–5999 | Assigned | ACCESS ONE, INC. - IL | 5447 | CHICGOZN02 | IL |
| 2005-12-13 | 773-349-8XXX | 8000–8999 | Assigned | ACCESS ONE, INC. - IL | 5447 | CHICGOZN08 | IL |
| 2005-12-13 | 773-382-3XXX | 3000–3999 | Assigned | ACCESS ONE, INC. - IL | 5447 | CHICGOZN09 | IL |
| 2005-12-13 | 773-435-5XXX | 5000–5999 | Assigned | ACCESS ONE, INC. - IL | 5447 | CHICGOZN04 | IL |
| 2005-12-13 | 773-724-6XXX | 6000–6999 | Assigned | ACCESS ONE, INC. - IL | 5447 | CHICGOZN03 | IL |
| 2005-12-13 | 773-729-3XXX | 3000–3999 | Assigned | ACCESS ONE, INC. - IL | 5447 | CHICGOZN07 | IL |
| 2005-12-13 | 773-922-7XXX | 7000–7999 | Assigned | ACCESS ONE, INC. - IL | 5447 | CHICGOZN05 | IL |
| 2005-12-08 | 773-253-3XXX | 3000–3999 | Assigned | ACCESS ONE, INC. - IL | 5447 | CHICGOZN10 | IL |
| 2005-12-08 | 773-357-4XXX | 4000–4999 | Assigned | ACCESS ONE, INC. - IL | 5447 | CHICGOZN11 | IL |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.