NumberResearchThousands-blocks in 618-501
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026
The ten 1,000-number thousand-blocks inside prefix 618-501 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 618 blocks
Most active assignees, all time — NPA 618
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
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Dec 2025
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2013-04-04 | 618-501-0XXX | 0000–0999 | Assigned | PEERLESS NETWORK OF ILLINOIS, LLC - IL | 063E | GRANITE CY | IL |
| 2013-03-05 | 618-501-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | GRANITE CY | IL |
| 2013-06-10 | 618-501-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | GRANITE CY | IL |
| 2013-06-10 | 618-501-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | GRANITE CY | IL |
| 2013-08-22 | 618-501-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | GRANITE CY | IL |
| 2012-12-14 | 618-501-5XXX | 5000–5999 | Assigned | MCC NETWORK SERVICES, LLC | 075A | GRANITE CY | IL |
| 2012-11-01 | 618-501-6XXX | 6000–6999 | Assigned | PAETEC ITEL, LLC | 829J | GRANITE CY | IL |
| 2013-09-17 | 618-501-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | GRANITE CY | IL |
| 2013-04-04 | 618-501-8XXX | 8000–8999 | Assigned | PEERLESS NETWORK OF ILLINOIS, LLC - IL | 063E | GRANITE CY | IL |
| 2015-02-04 | 618-501-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | GRANITE CY | IL |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.