NumberResearchThousands-blocks in 309-502
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 309-502 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 309 blocks
Most active assignees, all time — NPA 309
New assignments by month
Sep 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2011-03-03 | 309-502-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | GENESEO | IL |
| 2006-10-17 | 309-502-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | GENESEO | IL |
| 2023-06-01 | 309-502-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | GENESEO | IL |
| 2023-11-29 | 309-502-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | GENESEO | IL |
| — | 309-502-4XXX | 4000–4999 | Available | GENESEO | IL | ||
| — | 309-502-5XXX | 5000–5999 | Available | GENESEO | IL | ||
| — | 309-502-6XXX | 6000–6999 | Assigned (pending) | GENESEO | IL | ||
| 2020-09-09 | 309-502-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | 7136 | GENESEO | IL |
| 2019-10-30 | 309-502-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | GENESEO | IL |
| — | 309-502-9XXX | 9000–9999 | Reserved | METROPCS, INC. | 5562 | GENESEO | 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.