AS18596
Madison Telephone Company
Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
- Baseline (neutral) 65
- Isp allocation +5
- Trust score 70 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Network profile
Source: PeeringDB →Present at 1 internet exchange: Equinix Chicago
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 66.242.192.0/19 | 8.2K |
66.3%
|
Madison Telephone Company | US | Illinois | Staunton |
| 76.77.224.0/20 | 4.1K |
85.5%
|
Madison Telephone Company | US | Illinois | Staunton |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS18596 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 66.242.221.0/24 | 14,498 | 2026-07-30 13:29:16 |
| 76.77.236.0/22 | 9,817 | 2026-07-30 13:29:30 |
| 66.242.192.0/24 | 6,521 | 2026-07-30 12:33:01 |
| 66.242.208.0/22 | 6,148 | 2026-07-30 12:26:02 |
| 76.77.232.0/22 | 6,146 | 2026-07-30 12:27:20 |
| 66.242.205.0/24 | 5,586 | 2026-07-13 06:46:22 |
| 66.242.206.0/23 | 5,532 | 2026-07-13 06:46:22 |
| 66.242.192.0/19 | 4,856 | 2026-07-30 12:29:55 |
| 76.77.224.0/20 | 4,784 | 2026-07-30 12:35:14 |
Frequently Asked Questions
What is AS18596?
AS18596 is an Autonomous System Number assigned to Madison Telephone Company. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).
How many IP addresses does AS18596 announce?
AS18596 announces 12.3K IPv4 addresses distributed across 2 routed CIDR prefixes. The network is registered in United States.
Who operates AS18596?
AS18596 is operated by Madison Telephone Company. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS18596 registered in?
AS18596 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
