Robtex

Up: 173.252.88.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 173.252.92.0/23
Down right: 173.252.94.0/23

IP	Type	Hostname
173.252.92.1	A	origincache-pt.t.fbcdn.net
173.252.92.192	A+PTR	origincache-shv-09-atn3.fbcdn.net
173.252.92.224	A	origincache-atn.t.fbcdn.net
173.252.95.0	PTR	fwdproxy-atn-000.fbsv.net
173.252.95.1	A	fwdproxy-atn-001.fbsv.net
173.252.95.2	A+PTR	fwdproxy-atn-002.fbsv.net
173.252.95.3	A	fwdproxy-atn-003.fbsv.net
173.252.95.4	A+PTR	fwdproxy-atn-004.fbsv.net
173.252.95.5	A	fwdproxy-atn-005.fbsv.net
173.252.95.6	A+PTR	fwdproxy-atn-006.fbsv.net
173.252.95.7	A+PTR	fwdproxy-atn-007.fbsv.net
173.252.95.8	A+PTR	fwdproxy-atn-008.fbsv.net
173.252.95.9	A+PTR	fwdproxy-atn-009.fbsv.net
173.252.95.10	A+PTR	fwdproxy-atn-010.fbsv.net
173.252.95.11	A	fwdproxy-atn-011.fbsv.net
173.252.95.12	A+PTR	fwdproxy-atn-012.fbsv.net
173.252.95.13	A+PTR	fwdproxy-atn-013.fbsv.net
173.252.95.14	A+PTR	fwdproxy-atn-014.fbsv.net
173.252.95.15	A+PTR	fwdproxy-atn-015.fbsv.net
173.252.95.16	A	fwdproxy-atn-016.fbsv.net
173.252.95.17	A	fwdproxy-atn-017.fbsv.net
173.252.95.18	A	fwdproxy-atn-018.fbsv.net
173.252.95.19	A+PTR	fwdproxy-atn-019.fbsv.net
173.252.95.20	A+PTR	fwdproxy-atn-020.fbsv.net
173.252.95.21	A	fwdproxy-atn-021.fbsv.net
173.252.95.22	A	fwdproxy-atn-022.fbsv.net
173.252.95.23	A+PTR	fwdproxy-atn-023.fbsv.net
173.252.95.24	A+PTR	fwdproxy-atn-024.fbsv.net
173.252.95.25	A+PTR	fwdproxy-atn-025.fbsv.net
173.252.95.26	A+PTR	fwdproxy-atn-026.fbsv.net
173.252.95.27	A	fwdproxy-atn-027.fbsv.net
173.252.95.28	A+PTR	fwdproxy-atn-028.fbsv.net
173.252.95.29	A+PTR	fwdproxy-atn-029.fbsv.net
173.252.95.30	A	fwdproxy-atn-030.fbsv.net
173.252.95.31	A+PTR	fwdproxy-atn-031.fbsv.net
173.252.95.32	A+PTR	fwdproxy-atn-032.fbsv.net
173.252.95.33	A+PTR	fwdproxy-atn-033.fbsv.net
173.252.95.34	A+PTR	fwdproxy-atn-034.fbsv.net
173.252.95.35	A+PTR	fwdproxy-atn-035.fbsv.net
173.252.95.36	A+PTR	fwdproxy-atn-036.fbsv.net
173.252.95.37	A+PTR	fwdproxy-atn-037.fbsv.net
173.252.95.38	A+PTR	fwdproxy-atn-038.fbsv.net
173.252.95.39	A	fwdproxy-atn-039.fbsv.net
173.252.95.40	A	fwdproxy-atn-040.fbsv.net
173.252.95.41	A+PTR	fwdproxy-atn-041.fbsv.net
173.252.95.42	A+PTR	fwdproxy-atn-042.fbsv.net
173.252.95.43	A+PTR	fwdproxy-atn-043.fbsv.net
173.252.95.44	A	fwdproxy-atn-044.fbsv.net
173.252.95.49	A+PTR	fwdproxy-atn-049.fbsv.net
173.252.95.120	PTR	fwdproxy-atn-120.fbsv.net
173.252.95.252	A+PTR	headers-shv-00-ratn0.facebook.com
173.252.95.252	A	headers-regional.vvv.facebook.com
173.252.95.252	A	headers-regional-shv-03-atn2.facebook.com
173.252.95.254	A	headers-regional.vvv.facebook.com
173.252.95.254	A	headers-regional-shv-22-atn1.facebook.com