NumberResearchThousands-blocks in 810-990
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 810-990 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 810 blocks
Most active assignees, all time — NPA 810
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2005-11-09 | 810-990-0XXX | 0000–0999 | Assigned | ACD TELECOM, INC. - MI | 3535 | PORT HURON | MI |
| — | 810-990-1XXX | 1000–1999 | Reserved | TELEPORT COMMUNICATIONS AMERICA, LLC - MI | 770E | PORT HURON | MI |
| 2010-04-27 | 810-990-2XXX | 2000–2999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | PORT HURON | MI |
| 2010-04-27 | 810-990-3XXX | 3000–3999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | PORT HURON | MI |
| 2010-05-07 | 810-990-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | PORT HURON | MI |
| 2010-05-07 | 810-990-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | PORT HURON | MI |
| 2010-03-30 | 810-990-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - MI | 991E | PORT HURON | MI |
| 2006-05-25 | 810-990-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | PORT HURON | MI |
| 2008-01-04 | 810-990-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | PORT HURON | MI |
| 2008-03-05 | 810-990-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | PORT HURON | MI |
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.