Robtex

Up: 149.198.0.0/15
Can't show all results, try to descend to a more specific CIDR
Down left: 149.199.0.0/17
Down right: 149.199.128.0/17
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
149.199.0.1	PTR	unknown-0-1.xilinx.com
149.199.3.2	PTR	unknown-3-2.xilinx.com
149.199.4.2	PTR	unknown-4-2.xilinx.com
149.199.10.2	PTR	unknown-10-2.xilinx.com
149.199.11.254	PTR	unknown-11-254.xilinx.com
149.199.19.2	PTR	unknown-19-2.xilinx.com
149.199.33.2	PTR	unknown-33-2.xilinx.com
149.199.36.2	PTR	unknown-36-2.xilinx.com
149.199.42.1	PTR	unknown-42-1.xilinx.com
149.199.60.38	PTR	unknown-60-38.xilinx.com
149.199.60.38	A	gateway2.xilinx.com
149.199.60.38	A	mailgate.xilinx.com
149.199.60.39	PTR	unknown-60-39.xilinx.com
149.199.60.39	A	gateway3.xilinx.com
149.199.60.62	PTR	unknown-60-62.xilinx.com
149.199.62.4	PTR	unknown-62-4.xilinx.com
149.199.70.17	PTR	unknown-70-17.xilinx.com
149.199.70.17	A	sp2010-ext.xilinx.com
149.199.78.3	PTR	unknown-78-3.xilinx.com
149.199.86.2	PTR	unknown-86-2.xilinx.com
149.199.95.46	PTR	unknown-95-46.xilinx.com
149.199.95.47	PTR	unknown-95-47.xilinx.com
149.199.96.13	PTR	unknown-96-13.xilinx.com
149.199.100.1	PTR	unknown-100-1.xilinx.com
149.199.114.16	PTR	unknown-114-16.xilinx.com
149.199.128.2	PTR	unknown-128-2.xilinx.com
149.199.137.228	PTR	unknown-137-228.xilinx.com
149.199.160.1	PTR	unknown-160-1.xilinx.com
149.199.160.2	PTR	unknown-160-2.xilinx.com
149.199.160.3	PTR	unknown-160-3.xilinx.com
149.199.198.186	PTR	unknown-198-186.xilinx.com
149.199.198.187	PTR	unknown-198-187.xilinx.com
149.199.203.4	PTR	unknown-203-4.xilinx.com
149.199.253.12	PTR	unknown-253-12.xilinx.com
149.199.255.255	PTR	unknown-255-255.xilinx.com