- IP Info

Detection Information is dedicated to SURBL. Details on protocols, hostnames, network point-of-presence, and more are provided below. You can access the full data set via the Netify Data Feed API.

IP Stack Summary

Layer Details
Application SURBL - Logo SURBL
Network Cisco Secure Email - Logo Cisco Secure Email @ Core Network

Geo Cluster

Top countries connecting to


IP Info

IP Address On the Cisco Secure Email Network
Hostname surbl-ns1.sv4.ironport.com -

Routing Info

ASN AS16417
ASN Route
ASN Label Cisco Systems Ironport Division
Category Mail
Organization Cisco Secure Email - Logo Cisco Secure Email
Location United States
Routing and ASN
The ASN (Autonomous System Number) provides routing and location information for traffic flowing to this IP address.


SURBL - Cybersecurity
SURBL - Logo

SURBLs are lists of web sites that have appeared in spam messages. Unlike most lists, SURBLs are not lists of message senders.

Dedicated IP

Some IP addresses can be shared across multiple applications, especially on content delivery networks (CDNs). However, it looks like is dedicated to SURBL.


Core Network - Logo

Cisco Secure Email - Core Network
Cisco Secure Email (formerly IronPort) is an email security solution that protects organizations from email-borne threats such as spam, phishing, malware, ransomware, and other advanced email attacks.

Cisco Secure Email manages the underlying network for this corner of the Internet.

Notable Hostnames

  • j.surbl.org
Notable Hostnames Data
The list of notable hostnames that were detected on this IP address come from DNS, HTTP headers, TLS certificates, DNS hinting, and other deep packet inspection methods.

Protocol Stats

The following is a sample of protocols that were detected on this IP address.

IP Protocol Protocol Port Byte % Flow % Average Bytes / Flow
UDP DNS 53 > 99.9+ > 99.9+ 200

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