I've posted this else where, but I am posting in this forum because the problem is specifically with Cox's DNS servers not resolving for a specific service that I use -- The domain name elysium-project.org.
Normally I prefer to just use Cox's DNS servers (I hate when people advocate 8.8.8.8 as a panacea for problems) but in this case switching to another server seems to fix the problem.
me@LAPPY486:~$ dig @172.16.4.1 elysium-project.org ; <<>> DiG 9.9.5-3ubuntu0.8-Ubuntu <<>> @172.16.4.1 elysium-project.org; (1 server found);; global options: +cmd;; Got answer:;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 6711;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1 ;; OPT PSEUDOSECTION:; EDNS: version: 0, flags:; udp: 512;; QUESTION SECTION:;elysium-project.org. IN A ;; AUTHORITY SECTION:elysium-project.org. 49 IN SOA ken.ns.cloudflare.com. hostmaster.topdns.com. 2017010802 43200 900 1209600 3600 ;; Query time: 15 msec;; SERVER: 172.16.4.1#53(172.16.4.1);; WHEN: Sun Jan 08 19:21:52 STD 2017;; MSG SIZE rcvd: 123 me@LAPPY486:~$ dig @68.105.28.16 elysium-project.org ; <<>> DiG 9.9.5-3ubuntu0.8-Ubuntu <<>> @68.105.28.16 elysium-project.org; (1 server found);; global options: +cmd;; Got answer:;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 35292;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1 ;; OPT PSEUDOSECTION:; EDNS: version: 0, flags:; udp: 512;; QUESTION SECTION:;elysium-project.org. IN A ;; AUTHORITY SECTION:elysium-project.org. 519 IN SOA ken.ns.cloudflare.com. hostmaster.topdns.com. 2017010802 43200 900 1209600 3600 ;; Query time: 15 msec;; SERVER: 68.105.28.16#53(68.105.28.16);; WHEN: Sun Jan 08 19:22:05 STD 2017;; MSG SIZE rcvd: 123 me@LAPPY486:~$ dig @4.2.2.2 elysium-project.org ; <<>> DiG 9.9.5-3ubuntu0.8-Ubuntu <<>> @4.2.2.2 elysium-project.org; (1 server found);; global options: +cmd;; Got answer:;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 35739;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION:; EDNS: version: 0, flags:; udp: 8192;; QUESTION SECTION:;elysium-project.org. IN A ;; ANSWER SECTION:elysium-project.org. 300 IN A 104.27.136.205elysium-project.org. 300 IN A 104.27.137.205 ;; Query time: 156 msec;; SERVER: 4.2.2.2#53(4.2.2.2);; WHEN: Sun Jan 08 19:22:12 STD 2017;; MSG SIZE rcvd: 80 me@LAPPY486:~$ dig @8.8.8.8 elysium-project.org ; <<>> DiG 9.9.5-3ubuntu0.8-Ubuntu <<>> @8.8.8.8 elysium-project.org; (1 server found);; global options: +cmd;; Got answer:;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 46861;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION:; EDNS: version: 0, flags:; udp: 512;; QUESTION SECTION:;elysium-project.org. IN A ;; ANSWER SECTION:elysium-project.org. 299 IN A 104.27.136.205elysium-project.org. 299 IN A 104.27.137.205 ;; Query time: 62 msec;; SERVER: 8.8.8.8#53(8.8.8.8);; WHEN: Sun Jan 08 19:22:19 STD 2017;; MSG SIZE rcvd: 80
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