Autonomous System
AS19281
Quad9
Handle
AS19281
Name
QUAD9-AS-1
Registrar
Quad9
Status
active
Abuse email
abuse@quad9.net
Abuse phone
+1-415-831-3129
Registered
Sep 13, 2017
Last changed
Nov 13, 2019
About this Autonomous System
AS19281 identifies an 16-bit Autonomous System on the public internet. Autonomous Systems are independently administered networks — typically ISPs, hosting providers, large enterprises, or content delivery networks — that exchange traffic with each other using the Border Gateway Protocol (BGP).
This particular AS is registered to Quad9. ASN registration data comes from the regional internet registries (ARIN, RIPE NCC, APNIC, LACNIC, AFRINIC) and is updated as allocations change.
For deeper BGP context — including announced prefixes, peering relationships, and historical routing changes — Hurricane Electric's BGP toolkit and bgp.tools are the standard references.
What you can do with this information
- Identify the operator behind a suspicious IP — combine ASN with WHOIS for full registry context.
- Detect bot or hosting traffic — ASNs from cloud providers (AWS, DigitalOcean, OVH) signal automated traffic versus residential ISPs.
- Report abuse — use the abuse email above to file complaints against IPs under this AS.
- Read more about how ASNs work.
Frequently asked questions
Who owns AS19281?
AS19281 is registered to Quad9. Owners of an ASN are network operators — typically ISPs, hosting providers, large enterprises, or content delivery networks — who run independently routed networks on the public internet.
What is an ASN?
An Autonomous System Number identifies a network operator who runs an independently routed network on the internet. Each ASN is unique. ASNs come in 16-bit (0–65535) and 32-bit (up to ~4.3 billion) variants. Routing decisions between networks are exchanged using BGP, which references these numbers.
How do I report abuse from AS19281?
Contact the abuse desk for AS19281 at abuse@quad9.net or by phone at +1-415-831-3129. Include the offending IP address, timestamps in UTC, and a description of the activity. Reputable operators respond to verifiable abuse reports.
Where is AS19281 based?
Country information for AS19281 isn't published in the registry data.
Is AS19281 a 16-bit or 32-bit ASN?
AS19281 is a 16-bit ASN. The original ASN allocation used 16-bit numbers (0–65535).