AS36692 — CISCO-UMBRELLA

Network type: hosting

AS36692 announces 201 IPv4 prefixes covering 166,144 addresses and 70 IPv6 prefixes.

About this network

Cisco Umbrella (CISCO-UMBRELLA) — the network behind the OpenDNS public resolvers and Cisco's cloud DNS-security service.

What it's used for

• Serving the public DNS resolvers at 208.67.222.222 / 208.67.220.220 and Umbrella's DNS-layer security filtering for enterprises.

Notable

• An anycast DNS network: the same resolver IPs answer from many locations, so an IP here is a DNS endpoint, not a content host.
• OpenDNS was an early popular alternative resolver (content filtering, typo correction) before Cisco acquired it and folded it into Umbrella.

Interesting

• Public resolvers like this are frequently seen in device and router configs, which is why the network turns up often in DNS-related lookups.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 46.255.41.0/24
• 67.215.64.0/23
• 67.215.66.0/24
• 67.215.69.0/24
• 67.215.70.0/23
• 67.215.73.0/24
• 67.215.76.0/24
• 67.215.78.0/23
• 67.215.80.0/21
• 67.215.88.0/24
• 67.215.90.0/24
• 67.215.94.0/24
• 80.254.144.0/24
• 108.171.128.0/23
• 108.171.130.0/24
• 108.171.158.0/23
• 146.112.0.0/21
• 146.112.8.0/23
• 146.112.11.0/24
• 146.112.12.0/24
• 146.112.14.0/23
• 146.112.16.0/23
• 146.112.18.0/24
• 146.112.20.0/22
• 146.112.24.0/24
• 146.112.26.0/23
• 146.112.28.0/23
• 146.112.31.0/24
• 146.112.33.0/24
• 146.112.34.0/23
• 146.112.36.0/23
• 146.112.38.0/24
• 146.112.40.0/21
• 146.112.48.0/20
• 146.112.64.0/22
• 146.112.70.0/23
• 146.112.72.0/23
• 146.112.80.0/22
• 146.112.84.0/23
• 146.112.86.0/24
• 146.112.92.0/22
• 146.112.96.0/20
• 146.112.112.0/21
• 146.112.120.0/24
• 146.112.122.0/24
• 146.112.124.0/23
• 146.112.126.0/24
• 146.112.128.0/22
• 146.112.132.0/23
• 146.112.135.0/24
• 146.112.136.0/21
• 146.112.144.0/20
• 146.112.160.0/21
• 146.112.168.0/22
• 146.112.173.0/24
• 146.112.174.0/23
• 146.112.176.0/22
• 146.112.184.0/22
• 146.112.188.0/24
• 146.112.190.0/23
• 146.112.192.0/20
• 146.112.208.0/24
• 146.112.210.0/23
• 146.112.214.0/23
• 146.112.216.0/23
• 146.112.219.0/24
• 146.112.221.0/24
• 146.112.222.0/23
• 146.112.224.0/21
• 146.112.232.0/23
• 146.112.235.0/24
• 146.112.236.0/22
• 146.112.240.0/20
• 151.186.0.0/22
• 151.186.4.0/23
• 151.186.7.0/24
• 151.186.8.0/21
• 151.186.16.0/22
• 151.186.20.0/23
• 151.186.25.0/24
• 151.186.26.0/23
• 151.186.28.0/24
• 151.186.30.0/23
• 151.186.33.0/24
• 151.186.34.0/24
• 151.186.64.0/22
• 151.186.68.0/24
• 151.186.70.0/23
• 151.186.74.0/23
• 151.186.76.0/24
• 151.186.78.0/23
• 151.186.80.0/20
• 151.186.98.0/23
• 151.186.100.0/22
• 151.186.104.0/23
• 151.186.108.0/22
• 151.186.115.0/24
• 151.186.116.0/23
• 151.186.118.0/24
• 151.186.120.0/21

and 171 more.

Upstream networks

• AS3356 Level 3 Parent, LLC
• AS2914 NTT America, Inc.
• AS3257 GTT Communications Inc.
• AS6939 Hurricane Electric LLC
• AS25605 Cisco OpenDNS, LLC
• AS701 Verizon Business
• AS1299 Arelion Sweden AB
• AS4637 Telstra Global
• AS6453 TATA COMMUNICATIONS (AMERICA) INC
• AS55836 Reliance Jio Infocomm Limited
• AS30607 Cisco OpenDNS, LLC
• AS4826 Vocus Connect International Backbone
• AS9583 Sify Limited
• AS37100 SEACOM Limited
• AS39386 Saudi Telecom Company JSC
• AS48237 Etihad Etisalat, a joint stock company
• AS9002 RETN Limited
• AS4755 TATA Communications formerly VSNL is Leading ISP
• AS24482 SG.GS
• AS3303 Swisscom (Schweiz) AG
• AS8551 Bezeq International Ltd.
• AS6762 TELECOM ITALIA SPARKLE S.p.A.
• AS1680 Cellcom Fixed Line Communication L.P
• AS19332 COORDINADORA DE CARRIER'S, S.A. DE C.V.
• AS34549 meerfarbig GmbH & Co. KG

Downstream networks

• AS25605 Cisco OpenDNS, LLC
• AS13445 Cisco Webex LLC

Adjacent networks

• AS3356 Level 3 Parent, LLC
• AS2914 NTT America, Inc.
• AS25605 Cisco OpenDNS, LLC
• AS3257 GTT Communications Inc.
• AS6939 Hurricane Electric LLC
• AS701 Verizon Business
• AS1299 Arelion Sweden AB
• AS4637 Telstra Global
• AS30607 Cisco OpenDNS, LLC
• AS6453 TATA COMMUNICATIONS (AMERICA) INC
• AS55836 Reliance Jio Infocomm Limited
• AS37100 SEACOM Limited
• AS4826 Vocus Connect International Backbone
• AS9583 Sify Limited
• AS39386 Saudi Telecom Company JSC
• AS48237 Etihad Etisalat, a joint stock company
• AS9002 RETN Limited
• AS4755 TATA Communications formerly VSNL is Leading ISP
• AS24482 SG.GS
• AS3303 Swisscom (Schweiz) AG
• AS8551 Bezeq International Ltd.
• AS6762 TELECOM ITALIA SPARKLE S.p.A.
• AS1680 Cellcom Fixed Line Communication L.P
• AS19332 COORDINADORA DE CARRIER'S, S.A. DE C.V.
• AS34549 meerfarbig GmbH & Co. KG

Internet exchanges

• IX.br (PTT.br) São Paulo — São Paulo, Brazil
• DE-CIX Frankfurt — Frankfurt, Germany
• LINX LON1 — London, United Kingdom
• AMS-IX Amsterdam — Amsterdam, Netherlands
• NAPAfrica IX Johannesburg — Johannesburg, South Africa
• France-IX Paris — Paris, France
• Equinix Internet Exchange Singapore — Singapore, Singapore
• Milan Internet Exchange — Milan, Italy
• Equinix Internet Exchange Ashburn — Ashburn, United States
• BroadBand Internet eXchange Tokyo — Tokyo, Japan
• Seattle Internet Exchange — Seattle, United States
• London Network Access Point — London, United Kingdom
• NAPAfrica IX Cape Town — Cape Town, South Africa
• Hong Kong Internet Exchange — Hong Kong, China
• JPIX Tokyo — Tokyo, Japan
• Equinix Internet Exchange Warsaw — Warsaw, Poland
• Toronto Internet Exchange — Toronto, Canada
• Equinix Internet Exchange Chicago — Chicago, United States
• DE-CIX Mumbai — Mumbai, India
• Megaport IX Sydney — Sydney, Australia
• Extreme IX Mumbai — Mumbai, India
• Equinix Internet Exchange Sydney — Sydney, Australia
• Equinix Internet Exchange Dallas — Dallas, United States
• New York International Internet Exchange — New York, United States
• NIX.CZ - Neutral Internet eXchange for the Czech Republic — Prague, Czech Republic
• Equinix Internet Exchange San Jose (Bay Area) — San Jose, United States
• FL-IX - The Florida Internet Exchange / Community IX - Florida — Miami, United States
• ESpanix Madrid Lower LAN — Madrid, Spain
• Digital Realty Atlanta Internet Exchange — Atlanta, United States
• Midwest Internet Cooperative Exchange — Minneapolis, United States
• Megaport IX Melbourne — Melbourne, Australia
• InterLAN-IX — Bucharest, Romania
• LINX Manchester — Manchester, United Kingdom
• BroadBand Internet eXchange Osaka — Osaka, Japan
• Equinix Internet Exchange Tokyo — Tokyo, Japan
• Internet Neutral Exchange Association CLG - LAN1 — Dublin, Ireland
• JPIX Osaka — Osaka, Japan
• UAE-IX — Dubai, United Arab Emirates
• Extreme IX Chennai — Chennai, India
• Equinix Internet Exchange Los Angeles — Los Angeles, United States
• Netnod Stockholm — Stockholm, Sweden
• Equinix Internet Exchange Palo Alto — Palo Alto, United States
• Digital Realty New York Internet Exchange — New York, United States
• Vancouver Internet Exchange — Vancouver, Canada
• Equinix Los Angeles IBX — Los Angeles, United States