AS19050
U.S. Department of Health & Human 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
- Government allocation +8
- Trust score 73 / 100
Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 158.73.0.0/16 | 65.5K |
0.0%
|
U.S. Department of Health & Human Services | US | — | — |
| 156.40.94.0/23 | 512 |
0.0%
|
U.S. Department of Health & Human Services | US | — | — |
| 156.40.93.0/24 | 256 |
0.0%
|
U.S. Department of Health & Human Services | US | — | — |
| 156.40.197.0/24 | 256 |
0.0%
|
U.S. Department of Health & Human Services | US | — | — |
| 156.40.246.0/24 | 256 |
0.0%
|
U.S. Department of Health & Human Services | US | — | — |
| 158.71.224.0/24 | 256 |
0.8%
|
U.S. Department of Health & Human Services | US | — | — |
| 158.73.30.0/24 | 256 |
0.0%
|
U.S. Department of Health & Human Services | US | — | — |
| 158.73.183.0/24 | 256 |
0.0%
|
U.S. Department of Health & Human Services | US | — | — |
| 158.73.196.0/24 | 256 |
0.0%
|
U.S. Department of Health & Human Services | US | — | — |
| 158.74.38.0/24 | 256 |
5.1%
|
U.S. Department of Health & Human Services | US | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS19050 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 |
|---|---|---|
| 156.40.94.0/24 | 9,199 | 2026-07-23 17:51:21 |
| 158.73.196.0/24 | 8,877 | 2026-07-23 17:51:21 |
| 158.74.38.0/24 | 8,580 | 2026-07-23 17:51:21 |
| 156.40.95.0/24 | 4,530 | 2026-07-23 17:51:17 |
| 156.40.197.0/24 | 3,844 | 2026-07-23 17:51:15 |
| 156.40.93.0/24 | 3,820 | 2026-07-23 17:51:15 |
| 158.71.224.0/24 | 3,282 | 2026-07-23 17:51:15 |
| 158.73.183.0/24 | 2,653 | 2026-07-23 17:51:15 |
| 158.73.0.0/16 | 2,641 | 2026-06-27 13:42:58 |
| 198.179.3.0/24 | 2,630 | 2026-06-27 13:42:58 |
| 198.179.4.0/24 | 2,626 | 2026-06-27 13:42:58 |
| 158.73.30.0/24 | 2,516 | 2026-07-23 17:51:15 |
| 156.40.246.0/24 | 1,376 | 2026-07-23 17:51:15 |
Frequently Asked Questions
What is AS19050?
AS19050 is an Autonomous System Number assigned to U.S. Department of Health & Human 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 AS19050 announce?
AS19050 announces 67.3K IPv4 addresses distributed across 10 routed CIDR prefixes. The network is registered in United States.
Who operates AS19050?
AS19050 is operated by U.S. Department of Health & Human Services. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS19050 registered in?
AS19050 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
