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 v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 138.33.33.0/24 | 256 |
0.0%
|
Grady Memorial Hospital | US | Georgia | Stone Mountain |
| 138.33.66.0/24 | 256 |
0.0%
|
Grady Memorial Hospital | US | — | — |
| 138.33.71.0/24 | 256 |
0.0%
|
AS395674 | US | — | — |
| 138.33.72.0/24 | 256 |
0.0%
|
Grady Memorial Hospital | US | — | — |
| 138.33.90.0/24 | 256 |
0.0%
|
AS395674 | US | — | — |
| 138.33.99.0/24 | 256 |
0.0%
|
AS395674 | US | Georgia | Atlanta |
| 192.35.46.0/24 | 256 |
0.0%
|
Grady Memorial Hospital | US | Georgia | Lithia Springs |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS4503 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 |
|---|---|---|
| 192.35.46.0/24 | 8,077 | 2026-07-31 02:29:22 |
| 138.33.33.0/24 | 5,822 | 2026-07-31 02:28:08 |
| 138.33.66.0/24 | 5,436 | 2026-07-31 02:28:08 |
| 138.33.72.0/24 | 5,433 | 2026-07-31 02:28:08 |
| 138.33.71.0/24 | 5,426 | 2026-07-31 02:28:08 |
| 138.33.99.0/24 | 5,359 | 2026-07-31 02:28:08 |
| 138.33.90.0/24 | 5,101 | 2026-07-31 02:28:08 |
Frequently Asked Questions
What is AS4503?
AS4503 is an Autonomous System Number assigned to Grady Memorial Hospital. 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 AS4503 announce?
AS4503 announces 1.8K IPv4 addresses distributed across 7 routed CIDR prefixes. The network is registered in United States.
Who operates AS4503?
AS4503 is operated by Grady Memorial Hospital. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS4503 registered in?
AS4503 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
