Overview
Censys operates a network identified by AS398722.
The record includes 199.45.154.0/24 as a representative IPv4 prefix. It is not the network’s complete or permanent address space.
Current services include Internet-wide security scanning, Internet measurement, service discovery, exposure research, and security platform infrastructure.
This record describes an autonomous system or publicly routed Internet network. It does not identify a physical Data Center, prove who operated an individual request, or establish that every address announced by the ASN is used for the same service.
Network prefixes
These are documented prefixes associated with this routed network. They are not necessarily the network’s complete current address space.
- Representative prefix
-
199.45.154.0/24
IPv4 · Active · RPKI Valid · checked 2026-09-02
Provider and network
- Network / Provider Name
- Censys
- Registered / Operating Organization
- Censys, Inc.
- ISP / Network Operator
- Censys, Inc.
- ASN
-
AS398722 - ASN Name
- AS-CENSYS-03
- Network Name
- AS-CENSYS-03
- Current Services
- Internet-wide security scanning, Internet measurement, service discovery, exposure research, and security platform infrastructure
- Provider Type
- Security provider
- Network Type
- Security service network
Network scope
- Network Country
- US
Traffic and handling
- Traffic Classification
- Internet Measurement / Scanner Traffic
- Traffic Label
- Security Scanner Network
- Risk Level
- Medium
- Recommended Action
- Log and identify as Censys scanning infrastructure. Rate-limit or block according to local measurement policy; Censys documents an opt-out path for its scanners.
- Default Rule Action
- Log
- Common Pattern
- Traffic commonly appears as Internet-wide service discovery, protocol probing, banner collection, security measurement, or Censys platform scanning.
- Detection Notes
- Censys explicitly documents AS398722 as a scanning ASN. Match the ASN and current prefixes, and for HTTP requests corroborate with the documented CensysInspect user agent when available.
Relationships
- Operator
- Censys, Inc. Evidence Checked 2026-09-02