NumberResearchThousands-blocks in 959-221
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 959-221 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 959 blocks
Most active assignees, all time — NPA 959
New assignments by month
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2021-08-25 | 959-221-0XXX | 0000–0999 | Assigned | OMNIPOINT COMMUNICATIONS, INC. - CT | 6624 | HARTFORD | CT |
| 2021-04-02 | 959-221-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | HARTFORD | CT |
| 2021-08-25 | 959-221-2XXX | 2000–2999 | Assigned | OMNIPOINT COMMUNICATIONS, INC. - CT | 6624 | HARTFORD | CT |
| 2021-08-25 | 959-221-3XXX | 3000–3999 | Assigned | OMNIPOINT COMMUNICATIONS, INC. - CT | 6624 | HARTFORD | CT |
| 2022-06-14 | 959-221-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 6388 | HARTFORD | CT |
| 2022-06-14 | 959-221-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 6388 | HARTFORD | CT |
| 2022-06-14 | 959-221-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 6388 | HARTFORD | CT |
| 2021-06-30 | 959-221-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CT | 4800 | HARTFORD | CT |
| 2022-01-14 | 959-221-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS, INC. - CT | 6624 | HARTFORD | CT |
| 2022-01-14 | 959-221-9XXX | 9000–9999 | Assigned | OMNIPOINT COMMUNICATIONS, INC. - CT | 6624 | HARTFORD | CT |
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.