128.231.91.0/24 IP Range

Summary

ASN	AS3527 National Institutes of Health
BGP	128.231.0.0/16
IPs with RDNS	65
Hosted Domains	0
Pingable IPs	2
Router IPs	0


128.231.91.0	—	0
128.231.91.1	—	0
128.231.91.2	b12-dc-dr-a-vlan77-int.net.nih.gov	0
128.231.91.3	b12-dc-dr-b-vlan77.net.nih.gov	0
128.231.91.4	—	0
128.231.91.5	—	0
128.231.91.6	—	0
128.231.91.7	—	0
128.231.91.8	citsitescope.cit.nih.gov	0
128.231.91.9	—	0
128.231.91.10	—	0
128.231.91.11	—	0
128.231.91.12	—	0
128.231.91.13	—	0
128.231.91.14	nihssoweb.nih.gov	0
128.231.91.15	nihssoweb2.nih.gov	0
128.231.91.16	—	0
128.231.91.17	—	0
128.231.91.18	—	0
128.231.91.19	—	0
128.231.91.20	—	0
128.231.91.21	js.cit.nih.gov	0
128.231.91.22	citportal-02.cit.nih.gov	0
128.231.91.23	citportal3.cit.nih.gov	0
128.231.91.24	collab.cit.nih.gov	0
128.231.91.25	nihlibrary.nih.gov	0
128.231.91.26	citportal6.cit.nih.gov	0
128.231.91.27	f5reserv.nihlibrary.nih.gov	0
128.231.91.28	collab.my.nih.gov	0
128.231.91.29	collab.my.nih.gov	0
128.231.91.30	genome.gov	0
128.231.91.31	nihportal01.cit.nih.gov	0
128.231.91.32	nihportal02.cit.nih.gov	0
128.231.91.33	nihportal03.cit.nih.gov	0
128.231.91.34	nihportal04.cit.nih.gov	0
128.231.91.35	nccam.nih.gov	0
128.231.91.36	—	0
128.231.91.37	nihportal07.cit.nih.gov	0
128.231.91.38	—	0
128.231.91.39	—	0
128.231.91.40	—	0
128.231.91.41	—	0
128.231.91.42	—	0
128.231.91.43	—	0
128.231.91.44	images.my.nih.gov	0
128.231.91.45	—	0
128.231.91.46	—	0
128.231.91.47	nihportal22.cit.nih.gov	0
128.231.91.48	—	0
128.231.91.49	—	0
128.231.91.50	staging.nihlogin.nih.gov	0
128.231.91.51	staging.my.nih.gov	0
128.231.91.52	externalportal.cit.nih.gov	0
128.231.91.53	humanresources.mydev.cit.nih.gov	0
128.231.91.54	humanresources.nih.gov	0
128.231.91.55	phsportal.nih.gov	0
128.231.91.56	—	0
128.231.91.57	—	0
128.231.91.58	—	0
128.231.91.59	—	0
128.231.91.60	—	0
128.231.91.61	—	0
128.231.91.62	—	0
128.231.91.63	—	0
128.231.91.64	—	0
128.231.91.65	—	0
128.231.91.66	b12-dc-dr-a-vlan154.net.nih.gov	0
128.231.91.67	b12-dc-dr-b-vlan154.net.nih.gov	0
128.231.91.68	—	0
128.231.91.69	—	0
128.231.91.70	—	0
128.231.91.71	—	0
128.231.91.72	—	0
128.231.91.73	—	0
128.231.91.74	—	0
128.231.91.75	—	0
128.231.91.76	—	0
128.231.91.77	—	0
128.231.91.78	—	0
128.231.91.79	—	0
128.231.91.80	—	0
128.231.91.81	—	0
128.231.91.82	—	0
128.231.91.83	—	0
128.231.91.84	—	0
128.231.91.85	—	0
128.231.91.86	—	0
128.231.91.87	—	0
128.231.91.88	—	0
128.231.91.89	—	0
128.231.91.90	—	0
128.231.91.91	—	0
128.231.91.92	—	0
128.231.91.93	—	0
128.231.91.94	—	0
128.231.91.95	—	0
128.231.91.96	—	0
128.231.91.97	—	0
128.231.91.98	—	0
128.231.91.99	—	0
128.231.91.100	gdc-2600-cit.net.nih.gov	0
128.231.91.101	—	0
128.231.91.102	—	0
128.231.91.103	—	0
128.231.91.104	—	0
128.231.91.105	b12-dc-dr-a-b-hsrp-vlan33-int.net.nih.gov	0
128.231.91.106	b12-dc-dr-a-vlan33-int.net.nih.gov	0
128.231.91.107	b12-dc-dr-b-vlan33.net.nih.gov	0
128.231.91.108	—	0
128.231.91.109	—	0
128.231.91.110	—	0
128.231.91.111	—	0
128.231.91.112	—	0
128.231.91.113	b12-dc-dr-a-b-hsrp-vlan35-int.net.nih.gov	0
128.231.91.114	b12-dc-dr-a-vlan35-int.net.nih.gov	0
128.231.91.115	b12-dc-dr-b-vlan35.net.nih.gov	0
128.231.91.116	nihcf.nih.gov	0
128.231.91.117	—	0
128.231.91.118	—	0
128.231.91.119	—	0
128.231.91.120	—	0
128.231.91.121	—	0
128.231.91.122	—	0
128.231.91.123	—	0
128.231.91.124	—	0
128.231.91.125	—	0
128.231.91.126	—	0
128.231.91.127	—	0
128.231.91.128	—	0
128.231.91.129	b12-dc-dr-a-b-hsrp-vlan36-int.net.nih.gov	0
128.231.91.130	b12-dc-dr-a-vlan36-int.net.nih.gov	0
128.231.91.131	b12-dc-dr-b-vlan36.net.nih.gov	0
128.231.91.132	—	0
128.231.91.133	—	0
128.231.91.134	—	0
128.231.91.135	—	0
128.231.91.136	—	0
128.231.91.137	—	0
128.231.91.138	—	0
128.231.91.139	—	0
128.231.91.140	—	0
128.231.91.141	—	0
128.231.91.142	—	0
128.231.91.143	—	0
128.231.91.144	—	0
128.231.91.145	b12-dc-dr-a-b-hsrp-vlan37-int.net.nih.gov	0
128.231.91.146	b12-dc-dr-a-vlan37-int.net.nih.gov	0
128.231.91.147	b12-dc-dr-b-vlan37.net.nih.gov	0
128.231.91.148	—	0
128.231.91.149	—	0
128.231.91.150	—	0
128.231.91.151	—	0
128.231.91.152	—	0
128.231.91.153	ens-main1.nih.gov	0
128.231.91.154	ens-main2.nih.gov	0
128.231.91.155	—	0
128.231.91.156	—	0
128.231.91.157	—	0
128.231.91.158	—	0
128.231.91.159	—	0
128.231.91.160	—	0
128.231.91.161	b12-dc-dr-a-b-hsrp-vlan82-int.net.nih.gov	0
128.231.91.162	b12-dc-dr-a-vlan82-int.net.nih.gov	0
128.231.91.163	b12-dc-dr-b-vlan82.net.nih.gov	0
128.231.91.164	—	0
128.231.91.165	—	0
128.231.91.166	—	0
128.231.91.167	—	0
128.231.91.168	—	0
128.231.91.169	—	0
128.231.91.170	—	0
128.231.91.171	—	0
128.231.91.172	—	0
128.231.91.173	—	0
128.231.91.174	—	0
128.231.91.175	—	0
128.231.91.176	—	0
128.231.91.177	b12-dc-dr-a-b-hsrp-vlan26-int.net.nih.gov	0
128.231.91.178	b12-dc-dr-a-vlan26.net.nih.gov	0
128.231.91.179	b12-dc-dr-b-vlan26.net.nih.gov	0
128.231.91.180	ldap.nih.gov	0
128.231.91.181	—	0
128.231.91.182	—	0
128.231.91.183	—	0
128.231.91.184	—	0
128.231.91.185	b12mr-f5-lb-c.net.nih.gov	0
128.231.91.186	b12mr-f5-lb-d.net.nih.gov	0
128.231.91.187	—	0
128.231.91.188	—	0
128.231.91.189	mailrc.nih.gov	0
128.231.91.190	—	0
128.231.91.191	—	0
128.231.91.192	—	0
128.231.91.193	b12-dc-dr-a-b-hsrp-vlan88-int.net.nih.gov	0
128.231.91.194	b12-dc-dr-a-vlan88-int.net.nih.gov	0
128.231.91.195	b12-dc-dr-b-vlan88.net.nih.gov	0
128.231.91.196	—	0
128.231.91.197	—	0
128.231.91.198	—	0
128.231.91.199	—	0
128.231.91.200	—	0
128.231.91.201	sbc01.hub.nih.gov	0
128.231.91.202	—	0
128.231.91.203	—	0
128.231.91.204	—	0
128.231.91.205	—	0
128.231.91.206	—	0
128.231.91.207	—	0
128.231.91.208	—	0
128.231.91.209	—	0
128.231.91.210	—	0
128.231.91.211	—	0
128.231.91.212	—	0
128.231.91.213	—	0
128.231.91.214	—	0
128.231.91.215	—	0
128.231.91.216	—	0
128.231.91.217	—	0
128.231.91.218	—	0
128.231.91.219	—	0
128.231.91.220	—	0
128.231.91.221	—	0
128.231.91.222	—	0
128.231.91.223	—	0
128.231.91.224	—	0
128.231.91.225	—	0
128.231.91.226	—	0
128.231.91.227	—	0
128.231.91.228	—	0
128.231.91.229	—	0
128.231.91.230	—	0
128.231.91.231	—	0
128.231.91.232	—	0
128.231.91.233	—	0
128.231.91.234	—	0
128.231.91.235	vs4.vetpro.org	0
128.231.91.236	—	0
128.231.91.237	—	0
128.231.91.238	—	0
128.231.91.239	vp4.vetpro.org	0
128.231.91.240	—	0
128.231.91.241	fcp.vetpro.org	0
128.231.91.242	—	0
128.231.91.243	—	0
128.231.91.244	—	0
128.231.91.245	—	0
128.231.91.246	—	0
128.231.91.247	—	0
128.231.91.248	—	0
128.231.91.249	—	0
128.231.91.250	preprod.vetpro.org	0
128.231.91.251	—	0
128.231.91.252	—	0
128.231.91.253	—	0
128.231.91.254	—	0
128.231.91.255	—	0

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

traceroute -a -n -q1 -m4 128.231.91.170

traceroute to 128.231.91.170 (128.231.91.170): 4 hops max, 52 byte packets

1 [AS150075] 103.169.86.1 0.685 ms

2 *

3 *

4 *

Measurement taken from

IPinfo ProbeNet in Indore, IN

On November 6th 2025