Cityside Fiber
AS18731 is Cityside Fiber (citysidefiber.com). It announces 4,864 IPv4 addresses in 4 prefixes, and 3 IPv6 prefixes.
United States· ARIN· allocated 2023-10-12· isp
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 States4,864 · 100.00%
Registry record
Its ASN Whois record, as the registry publishes it.
- handle
- CITYSIDE-01
- name
- Cityside Fiber
- org
- CNL-178
- org name
- Cityside Fiber
- org address
- 100 Spectrum Center Dr suite 500, Irvine, CA, 92618
- org city
- Irvine
- org country
- US
- country
- US
- source
- arin
- created
- 2023-10-12
- updated
- 2023-10-12
- remarks
- http://www.citysidefiber.com / NOC hours / 07:00 to 16:00 PST
- abuse name
- Raul Pelagio
- abuse email
- noc@citysidefiber.com
- abuse phone
- +1-877-914-2489
- abuse kind
- person
- abuse city
- Irvine
- abuse country
- US
- admin name
- Jacob Simon
- admin email
- jake.simon@citysidenetworks.com
- admin phone
- +1-727-599-9912
- admin kind
- person
- admin city
- Irvine
- admin country
- US
- tech name
- Edward McCroan
- tech email
- ed.mccroan@citysidefiber.com
- tech phone
- +1-949-779-2489
- tech kind
- person
- tech city
- Irvine
- tech country
- US
- abuse unvalidated since
- 2024-11-16
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.
- 0.06%
- anyip, geonode, dataimpulse3.35%
- None here
- None here
- None here
- None here
- Hosting IP76815.79%
- None here
- None here
- None here
- SSH IP310.64%
- 0.02%
- 0.02%
IPv4 prefixes
Every IPv4 prefix BGP Route saw it announce. A prefix another AS also announces says so.
| PREFIX | COUNTRY | RPKI | PEERS | FIRST SEEN |
|---|---|---|---|---|
| 23.164.40.0/24 | United States | valid | 16 | 2026-10-02 |
| 128.177.138.0/24 | United States | valid | 16 | 2026-10-02 |
| 154.50.58.0/24 | United States | not found | 16 | 2026-10-02 |
| 157.238.80.0/20 | United States | valid | 16 | 2026-10-02 |
IPv6 prefixes
Every IPv6 prefix BGP Route saw it announce.
| PREFIX | COUNTRY | RPKI | PEERS | FIRST SEEN |
|---|---|---|---|---|
| 2607:73c0::/32 | United States | valid | 19 | 2026-10-02 |
| 2607:73c0::/33 | United States | valid | 19 | 2026-10-02 |
| 2607:73c0:8000::/33 | United States | valid | 19 | 2026-10-02 |
Test the real build first.
An evaluation license puts a full current build in your hands, with no sampling, so you can measure it against your own traffic before anyone talks about terms.