[outages] Seemingly Nationwide Comcast DNS Outage

Anthony Hoppe anthony at vofr.net
Thu Jan 23 15:36:39 EST 2020


FWIW it seems to work for me via Comcast "Business" coax service out of Stockton, California. 

Server: 75.75.75.75 
Address: 75.75.75.75#53 

Non-authoritative answer: 
Name: google.com 
Address: 216.58.194.174 
Name: google.com 
Address: 2607:f8b0:4005:807::200e 

Server: 75.75.76.76 
Address: 75.75.76.76#53 

Non-authoritative answer: 
Name: google.com 
Address: 216.58.194.174 
Name: google.com 
Address: 2607:f8b0:4005:808::200e 

> From: "Christopher Trudeau via Outages" <outages at outages.org>
> To: outages at outages.org
> Sent: Thursday, January 23, 2020 12:27:14 PM
> Subject: [outages] Seemingly Nationwide Comcast DNS Outage

> Seeing many recent reports on the interwebs regarding a “nationwide Comcast
> outage”.

> Looks like it’s an issue with Comcast DNS (75.75.75.75 / 75.75.76.76) and not
> anything else, as queries to other public DNS servers (ex: 1.1.1.1 / 8.8.8.8)
> work just fine over my Comcast service.

> For reference, I’m located in Chicago, but I did perform NSLookup’s from a box
> in NYC, Dallas, and Seattle which resulted in similar behavior as seen below.

> nslookup google.com 75.75.75.75

> Server: UnKnown

> Address: 75.75.75.75

> *** UnKnown can't find google.com: Query refused

> nslookup google.com 75.75.76.76

> Server: UnKnown

> Address: 75.75.76.76

> *** UnKnown can't find google.com: Query refused

> nslookup google.com 1.1.1.1

> Server: one.one.one.one

> Address: 1.1.1.1

> Non-authoritative answer:

> Name: google.com

> Addresses: 2607:f8b0:4009:812::200e

> 172.217.5.14

> nslookup google.com 8.8.8.8

> Server: dns.google

> Address: 8.8.8.8

> Non-authoritative answer:

> Name: google.com

> Addresses: 2607:f8b0:4009:80f::200e

> 216.58.192.238

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