Using my provider's DNS, the ICQ login servers resolve to 205.188.210.217 which works fine:
login.icq.com. 1056 IN CNAME login.icq.net.
login.icq.net. 1056 IN CNAME login.glogin.icq.net.
login.glogin.icq.net. 2 IN A 205.188.210.217
--- 205.188.210.217 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4004ms
traceroute to 205.188.210.217 (205.188.210.217), 30 hops max, 60 byte packets
1 vss-2-6k.fr.eu (94.23.233.253) 0.689 ms * *
2 rbx-g2-a9.fr.eu (91.121.131.90) 8.038 ms 9.493 ms 9.493 ms
3 ldn-5-6k.uk.eu (91.121.131.178) 21.233 ms * *
4 * * *
5 * * *
6 ae5.scr3.LON3.gblx.net (67.17.72.22) 3.947 ms ae6.scr4.LON3.gblx.net (67.17.106.150) 53.023 ms ae5.scr3.LON3.gblx.net (67.17.72.22) 3.928 ms
7 po3.ar4.LON3.gblx.net (67.17.111.141) 4.383 ms 4.380 ms 4.431 ms
8 bb1-loh-ge-5-0-7.atdn.net (66.185.133.213) 10.169 ms 9.782 ms 9.772 ms
9 bb2-loh-xe-0-0-0.atdn.net (66.185.152.221) 4.400 ms 4.357 ms 4.393 ms
10 bb2-vie-xe-0-3-0.atdn.net (66.185.152.201) 95.488 ms 95.069 ms 94.661 ms
11 dar2-dtc-xe-2-1-0.atdn.net (66.185.141.126) 81.979 ms 89.683 ms dar2-dtc-xe-2-0-0.atdn.net (66.185.141.118) 86.964 ms
12 gear2-dtc-10GigabitEthernet1-1.net.aol.com (66.185.150.38) 86.760 ms 78.843 ms 78.843 ms
13 edge4-dtc-ae479.net.aol.com (149.174.32.26) 112.910 ms edge3-dtc-ae479.net.aol.com (149.174.32.214) 79.272 ms edge4-dtc-ae479.net.aol.com (149.174.32.26) 112.932 ms
14 149.174.33.22 (149.174.33.22) 110.861 ms 149.174.33.42 (149.174.33.42) 79.356 ms 149.174.33.18 (149.174.33.18) 112.934 ms
15 login.glogin.icq.net (205.188.210.217) 82.480 ms 90.352 ms 90.204 ms
=============================================================================
Using Google's Public DNS (see https://developers.google.com/speed/public-dns/ ), it resolves to 64.12.201.165, which seems down:
login.icq.com. 3590 IN CNAME login.icq.net.
login.icq.net. 3590 IN CNAME login.glogin.icq.net.
login.glogin.icq.net. 20 IN A 64.12.201.165
--- 64.12.201.165 ping statistics ---
6 packets transmitted, 0 received, 100% packet loss, time 5000ms
traceroute to 64.12.201.165 (64.12.201.165), 30 hops max, 60 byte packets
1 vss-2-6k.fr.eu (94.23.233.253) 0.803 ms * *
2 rbx-g1-a9.fr.eu (94.23.122.174) 2.877 ms 2.899 ms 2.890 ms
3 * * *
4 * * *
5 ae6.scr4.LON3.gblx.net (67.17.106.150) 52.245 ms ae5.scr3.LON3.gblx.net (67.17.72.22) 3.889 ms ae6.scr4.LON3.gblx.net (67.17.106.150) 52.248 ms
6 po3.ar4.LON3.gblx.net (67.17.111.141) 4.302 ms po6.ar4.LON3.gblx.net (67.16.142.102) 4.094 ms 4.149 ms
7 bb1-loh-ge-5-0-7.atdn.net (66.185.133.213) 4.030 ms 4.001 ms 3.963 ms
8 bb2-loh-xe-0-0-0.atdn.net (66.185.152.221) 4.379 ms bb2-nye-so-10-1-0.atdn.net (66.185.152.98) 73.200 ms 73.189 ms
9 bb2-vie-xe-0-3-0.atdn.net (66.185.152.201) 96.835 ms 96.842 ms bb2-vie-so-7-1-0.atdn.net (66.185.152.96) 104.171 ms
10 dar2-mtc-xe-2-0-0.atdn.net (66.185.139.138) 79.066 ms dar2-mtc-xe-2-1-0.atdn.net (66.185.152.109) 81.816 ms 89.780 ms
11 gear2-mtc-10GigabitEthernet1-1.net.aol.com (66.185.144.62) 89.847 ms 81.964 ms 82.129 ms
12 edge4-mtc-ae479.net.aol.com (149.174.48.26) 91.774 ms edge3-mtc-ae479.net.aol.com (149.174.48.210) 112.748 ms 105.223 ms
13 oscare1-mc1-ge-0-0-0-0.net.aol.com (149.174.49.14) 79.674 ms oscare2-mc2-ge-3-3-3.net.aol.com (149.174.49.42) 113.524 ms 149.174.49.18 (149.174.49.18) 125.200 ms
14 * * *
15 bucp-w2-vip.icq.net (64.12.201.165) 106.652 ms 116.072 ms 108.199 ms
{"text":"text","html5":"html","css":"css","javascript":"javascript","php":"php","python":"python","ruby":"ruby","lua":"lua","bash":"sh","erlang":"erlang","go":"golang","c":"c_cpp","cpp":"c_cpp","diff":"diff","latex":"latex","sql":"sql","xml":"xml","0":"text","abap":"abap","actionscript":"actionscript","actionscript3":"actionscript","ada":"ada","apache":"apache_conf","applescript":"applescript","asm":"assembly_x86","autohotkey":"autohotkey","closure":"closure","cobol":"cobol","coffeescript":"coffee","cpp-winapi":"c_cpp","c_loadrunner":"c_cpp","c_mac":"c_cpp","c_winapi":"c_cpp","csharp":"csharp","d":"d","dart":"dart","dot":"dot","eiffel":"eiffel","fortran":"fortran","groovy":"groovy","haskell":"haskell","haxe":"haxe","ini":"ini","io":"io","java":"java","java5":"java","make":"makefile","matlab":"matlab","mysql":"mysql","objc":"objectivec","ocaml":"ocaml","pascal":"pascal","perl":"perl","perl6":"perl","postgresql":"pgsql","powershell":"powershell","prolog":"prolog","properties":"properties","rails":"ruby","rust":"rust","scala":"scala","scheme":"scheme","smarty":"smarty","tcl":"tcl","vala":"vala","vb":"vbscript","verilog":"verilog","vhdl":"vhdl","yaml":"yaml"}