Johns Hopkins University
AS5723 is Johns Hopkins University (jhu.edu). It announces 135,680 IPv4 addresses in 8 prefixes, and 1 IPv6 prefixes.
United States· ARIN· allocated 1995-09-06· education
Where its space is
The IPv4 it announces that IP Geolocation places, by country. A /24 counts for the AS announcing most of it.
- United States135,680 · 100.00%
Registry record
Its ASN Whois record, as the registry publishes it.
- handle
- JHU
- name
- Johns Hopkins University
- org
- JHU-Z
- org name
- Johns Hopkins University
- org address
- Hopkins Information Technology Services, 3400 North Charles Street, Garland Hall, Suite 020, Baltimore, MD, 21218
- org city
- Baltimore
- org country
- US
- country
- US
- source
- arin
- created
- 1995-09-06
- updated
- 2020-09-08
- abuse name
- Network Operation Center
- abuse email
- noc@jhu.edu
- abuse phone
- +1-410-516-4357
- abuse kind
- role
- abuse city
- Baltimore
- abuse country
- US
- admin name
- Network Operation Center
- admin email
- noc@jhu.edu
- admin phone
- +1-410-516-4357
- admin kind
- role
- admin city
- Baltimore
- admin country
- US
- tech name
- Network Operation Center
- tech email
- noc@jhu.edu
- tech phone
- +1-410-516-4357
- tech kind
- role
- tech city
- Baltimore
- tech country
- US
What the databases see
Addresses each address-keyed database holds in the IPv4 it announces, as a share of that space, with its largest providers. Counts overlap.
- 0.00%
- anyip, geonode, mangoproxy0.04%
- None here
- None here
- None here
- None here
- Hosting IP6,9125.09%
- None here
- None here
- None here
- SSH IP2060.15%
- SMTP IP320.02%
- 0.01%
IPv4 prefixes
Every IPv4 prefix BGP Route saw it announce. A prefix another AS also announces says so.
| PREFIX | COUNTRY | RPKI | PEERS | FIRST SEEN |
|---|---|---|---|---|
| 128.220.0.0/16 | United States | valid | 20 | 2026-10-02 |
| 162.129.0.0/16 | United States | valid | 20 | 2026-10-02 |
| 192.12.13.0/24 | United States | valid | 20 | 2026-10-02 |
| 192.12.14.0/24 | United States | valid | 20 | 2026-10-02 |
| 198.57.32.0/21 | United States | valid | 20 | 2026-10-02 |
| 198.57.39.0/24 | United States | valid | 20 | 2026-10-02 |
| 198.57.40.0/22 | United States | valid | 20 | 2026-10-02 |
| 204.124.184.0/22 | United States | valid | 20 | 2026-10-02 |
IPv6 prefixes
Every IPv6 prefix BGP Route saw it announce.
| PREFIX | COUNTRY | RPKI | PEERS | FIRST SEEN |
|---|---|---|---|---|
| 2606:2b00::/32 | United States | valid | 20 | 2026-10-02 |
Test the real build first.
An evaluation license puts a full current build in your hands — every row, every column, no sampling — so you can measure it against your own traffic before anyone talks about terms.