NumberResearchThousands-blocks in 773-729
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026
The ten 1,000-number thousand-blocks inside prefix 773-729 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 773 blocks
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 |
|---|---|---|---|---|---|---|---|
| 2005-05-16 | 773-729-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | CHICGOZN07 | IL |
| 2019-06-10 | 773-729-1XXX | 1000–1999 | Assigned | ONVOY, LLC | 224C | CHICGOZN07 | IL |
| 2005-09-14 | 773-729-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | CHICGOZN07 | IL |
| 2005-12-13 | 773-729-3XXX | 3000–3999 | Assigned | ACCESS ONE, INC. - IL | 5447 | CHICGOZN07 | IL |
| 2005-10-12 | 773-729-4XXX | 4000–4999 | Assigned | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | 8702 | CHICGOZN07 | IL |
| — | 773-729-5XXX | 5000–5999 | Reserved | PAETEC ITEL, LLC | 829J | CHICGOZN07 | IL |
| 2019-06-10 | 773-729-6XXX | 6000–6999 | Assigned | ONVOY, LLC | 224C | CHICGOZN07 | IL |
| 2005-11-30 | 773-729-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | CHICGOZN07 | IL |
| 2005-11-30 | 773-729-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | CHICGOZN07 | IL |
| 2005-08-03 | 773-729-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CHICGOZN07 | 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.