lgibbs.net works for me. The error you see is not what I would expect from a DNS error.
*info*
Ok so I did these and here are my results:
SPEEDTEST:
(My internet has always been slow but it's never behaved like this so I suspect speed is not the issue. You know more than I, though!)

TRACE:
Lauras-MacBook-Pro:~ lgibbs$ traceroute lgibbs.net
traceroute to lgibbs.net (207.58.182.138), 64 hops max, 52 byte packets
1 10.1.1.1 (10.1.1.1) 2.052 ms 1.200 ms 1.597 ms
2 rdl804.ba.optusnet.com.au (198.142.130.30) 373.753 ms 277.216 ms 291.425 ms
3 * * *
4 * * *
5 * * *
6 * * *
7 211.29.125.205 (211.29.125.205) 69.180 ms
198.142.250.245 (198.142.250.245) 91.909 ms
198.142.250.253 (198.142.250.253) 47.607 ms
8 198.142.139.116 (198.142.139.116) 46.276 ms 46.468 ms 46.663 ms
9 198.142.139.132 (198.142.139.132) 44.774 ms 46.424 ms 47.300 ms
10 tg0-1-0-3.ig11.optus.net.au (202.139.19.33) 46.396 ms 46.554 ms 46.302 ms
11 203.208.131.225 (203.208.131.225) 155.887 ms 154.540 ms 156.452 ms
12 63-218-211-253.static.pccwglobal.net (63.218.211.253) 343.220 ms 253.585 ms 254.964 ms
13 tenge12-4.br01.rst01.pccwbtn.net (63.223.45.14) 414.595 ms 335.029 ms 381.014 ms
14 tenge12-4.br01.rst01.pccwbtn.net (63.223.45.14) 352.780 ms 411.660 ms 309.869 ms
15 servint.tenge10-3.br01.rst01.pccwbtn.net (63.218.125.22) 461.260 ms 338.787 ms 377.737 ms
16 209.50.254.9.servint.net (209.50.254.9) 411.596 ms 562.783 ms 506.649 ms
17 209.50.254.6.servint.net (209.50.254.6) 411.245 ms 318.558 ms 350.471 ms
18 sc-clm3872.servint.net (209.50.240.170) 320.948 ms 362.402 ms 440.248 ms
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64 * * *
Lauras-MacBook-Pro:~ lgibbs$
DNS LOOKUP:
lgibbs$ nslookup lgibbs.net
Server: 8.8.8.8
Address: 8.8.8.8#53
Non-authoritative answer:
Name: lgibbs.net
Address: 207.58.182.138
Lauras-MacBook-Pro:~ lgibbs$
Edited by Baconfan, 06 August 2016 - 04:11 PM.