Robtex

Up: 148.204.128.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 148.204.144.0/21
Down right: 148.204.152.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
148.204.144.130	PTR	pc-144-130.cenlexsto.ipn.mx
148.204.144.130	A+PTR	www.saes.cenlexsto.ipn.mx
148.204.145.7	PTR	pc-145-007.cecyt11.ipn.mx
148.204.145.7	A+PTR	www.saes.cecyt11.ipn.mx
148.204.145.7	PTR	www.cecyt11.saes.ipn.mx
148.204.147.135	A	decanato.ipn.mx
148.204.148.62	A+PTR	ciecas.gw-ipn.ipn.mx
148.204.148.62	PTR	pc-062.ciecas.ipn.mx
148.204.148.126	A+PTR	ciebt.gw-ipn.ipn.mx
148.204.148.126	PTR	ciecas.gw-ipn.ipn.mx
148.204.149.66	PTR	pc-149-066.cics-sto.ipn.mx
148.204.149.66	A+PTR	www.sepi.cics-sto.ipn.mx
148.204.149.66	A	www.virtual.cics-sto.ipn.mx
148.204.150.187	PTR	enlace-060.fw-sto.ipn.mx
148.204.150.187	A+PTR	controller.ipn.mx
148.204.150.188	A	controller.ipn.mx
148.204.150.189	A	controller.ipn.mx
148.204.150.254	PTR	ciecas.gw-ipn.ipn.mx
148.204.150.254	PTR	reservada.prestaciones.ipn.mx
148.204.151.124	A+PTR	www.competenciastutoriales.ipn.mx
148.204.151.124	A+PTR	bibliotecadigital.escasto.ipn.mx
148.204.151.124	PTR	www.bibliotecadigital.escasto.ipn.mx
148.204.155.8	PTR	ps-155-008.esm.ipn.mx
148.204.155.8	A+PTR	www.saes.esm.ipn.mx
148.204.155.8	PTR	www.esm.saes.ipn.mx
148.204.155.79	PTR	ps-155-079.esm.ipn.mx
148.204.156.254	PTR	libre.gw-ipn.ipn.mx
148.204.156.254	PTR	reservada.stotomas.ipn.mx
148.204.159.254	PTR	casc1-s37.gw-ipn.ipn.mx
148.204.159.254	PTR	reservada.stotomas.ipn.mx