AS19721
Magellan Health Services
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
- Trust score 65 / 100
Experimental · trust-vectors model v1.2.1 — a transparent heuristic, not a definitive verdict. How it works →
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 204.193.64.0/19 | 8.2K |
1.7%
|
Magellan Health Services | US | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS19721 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 |
|---|---|---|
| 204.193.64.0/19 | 13,750 | 2026-10-20 09:42:53 |
| 204.193.64.0/20 | 13,672 | 2026-10-20 09:44:59 |
| 204.193.84.0/22 | 13,500 | 2026-10-20 09:42:53 |
| 204.193.84.0/24 | 9,982 | 2026-10-20 09:43:25 |
| 204.193.86.0/23 | 9,982 | 2026-10-20 09:43:25 |
| 204.193.85.0/24 | 9,972 | 2026-10-20 09:43:25 |
| 204.193.80.0/20 | 9,255 | 2026-10-20 09:43:18 |
| 204.193.80.0/24 | 9,188 | 2026-10-20 09:43:18 |
| 204.193.75.0/24 | 9,185 | 2026-10-20 09:43:18 |
| 204.193.88.0/24 | 9,178 | 2026-10-20 09:43:18 |
| 204.193.74.0/24 | 9,174 | 2026-10-20 09:43:18 |
| 204.193.72.0/24 | 9,122 | 2026-10-20 09:43:18 |
| 204.193.93.0/24 | 9,111 | 2026-10-20 09:43:18 |
| 204.193.71.0/24 | 9,094 | 2026-10-20 09:43:18 |
Frequently Asked Questions
What is AS19721?
AS19721 is an Autonomous System Number assigned to Magellan Health Services. 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 AS19721 announce?
AS19721 announces 8.2K IPv4 addresses distributed across 1 routed CIDR prefixes. The network is registered in United States.
Who operates AS19721?
AS19721 is operated by Magellan Health Services. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS19721 registered in?
AS19721 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
