Robtex

Up: 192.30.252.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 192.30.253.0/25
Down right: 192.30.253.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
192.30.253.2	A	github-debug.com
192.30.253.2	A	lb-192-30-253-2-iad.github.com
192.30.253.12	A+PTR	gw.internaltools-esx2-cp1-prd.iad.github.com
192.30.253.17	PTR	github-smtp2b-ext-cp1-prd.iad.github.net
192.30.253.64	A+PTR	lb-192-30-253-64-iad.github.com
192.30.253.64	A	garage.github.com
192.30.253.65	A+PTR	lb-192-30-253-65-iad.github.com
192.30.253.65	A	garage.github.com
192.30.253.66	A	garage.github.com
192.30.253.66	A	lb-192-30-253-66-iad.github.com
192.30.253.67	A+PTR	lb-192-30-253-67-iad.github.com
192.30.253.67	A	garage.github.com
192.30.253.80	A	lb-192-30-253-80-iad.github.com
192.30.253.80	A	glb-test.github.com
192.30.253.96	A	lb-192-30-253-96-iad.github.com
192.30.253.96	A	alambic-origin.githubusercontent.com
192.30.253.97	A	alambic-origin.githubusercontent.com
192.30.253.97	A	lb-192-30-253-97-iad.github.com
192.30.253.98	A	alambic-origin.githubusercontent.com
192.30.253.98	A	lb-192-30-253-98-iad.github.com
192.30.253.99	A	alambic-origin.githubusercontent.com
192.30.253.99	A	lb-192-30-253-99-iad.github.com
192.30.253.112	A	coolctc.com
192.30.253.112	A	akshaysarkar.com
192.30.253.112	A	wyznaga.com
192.30.253.113	A	coolctc.com
192.30.253.113	A	magicalpixi.com
192.30.253.113	A	tangweirong.com
192.30.253.114	A	lb-192-30-253-114-iad.github.com
192.30.253.114	A	assets.github.com
192.30.253.114	A	assets-origin.github.com
192.30.253.115	A	assets.github.com
192.30.253.115	A	assets-origin.github.com
192.30.253.115	A	lb-192-30-253-115-iad.github.com
192.30.253.116	A	api.github.com
192.30.253.116	A	lb-192-30-253-116-iad.github.com
192.30.253.117	A	api.github.com
192.30.253.117	A	lb-192-30-253-117-iad.github.com
192.30.253.118	A	gist.github.com
192.30.253.118	A	lb-192-30-253-118-iad.github.com
192.30.253.119	A	gist.github.com
192.30.253.119	A	lb-192-30-253-119-iad.github.com
192.30.253.120	A	codeload.github.com
192.30.253.120	A	lb-192-30-253-120-iad.github.com
192.30.253.121	A	codeload.github.com
192.30.253.121	A	lb-192-30-253-121-iad.github.com
192.30.253.122	A	lb-192-30-253-122-iad.github.com
192.30.253.123	A	lb-192-30-253-123-iad.github.com
192.30.253.124	A	live.github.com
192.30.253.124	A	lb-192-30-253-124-iad.github.com
192.30.253.125	A	live.github.com
192.30.253.125	A	lb-192-30-253-125-iad.github.com
192.30.253.128	A	lb-192-30-253-128-iad.github.com
192.30.253.128	A	launch-editor.github.com
192.30.253.129	A	launch-editor.github.com
192.30.253.129	A	lb-192-30-253-129-iad.github.com
192.30.253.153	A	corriveauenterprises.com
192.30.253.162	A	space-needle.github.com
192.30.253.162	A	lb-192-30-253-162-iad.github.com
192.30.253.163	A	space-needle.github.com
192.30.253.163	A	lb-192-30-253-163-iad.github.com
192.30.253.164	A	lb-192-30-253-164-iad.github.com
192.30.253.166	A	lb-192-30-253-166-iad.github.com
192.30.253.166	A	redirect.github.com
192.30.253.167	A	redirect.github.com
192.30.253.167	A	ghub.com
192.30.253.167	A	hghub.com
192.30.253.168	A+PTR	glb-public-internal.githubapp.com
192.30.253.168	A	lb-192-30-253-168-iad.github.com
192.30.253.169	A+PTR	lb-192-30-253-169-iad.github.com
192.30.253.169	A	babel-garage.github.com
192.30.253.169	A	gist-garage.github.com
192.30.253.170	A	in-1.smtp.github.com
192.30.253.170	A	smtp.github.com
192.30.253.170	A	lb-192-30-253-170-iad.github.com
192.30.253.171	A+PTR	lb-192-30-253-171-iad.github.com
192.30.253.171	A	smtp.github.com
192.30.253.171	A	in-2.smtp.github.com
192.30.253.172	A+PTR	glb-4296d8-public-internal.githubapp.com
192.30.253.172	A	admin.github.com
192.30.253.253	A	ridgefieldarttherapy.com