MCNC
AS81 is MCNC (mcnc.org). It announces 1,957,376 IPv4 addresses in 134 prefixes, and 4 IPv6 prefixes.
United States· ARIN· allocated 1986-08-07· 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 States1,957,376 · 100.00%
Registry record
Its ASN Whois record, as the registry publishes it.
- handle
- NCREN
- name
- MCNC
- org
- MCNC-Z
- org name
- MCNC
- org address
- 3021 E. Cornwallis Rd, Durham, NC, 27713-2852
- org city
- Durham
- org country
- US
- country
- US
- source
- arin
- created
- 1986-08-07
- updated
- 2026-06-10
- abuse name
- Abuse Contact
- abuse email
- abuse@mcnc.org
- abuse phone
- +1-919-248-4111
- abuse kind
- role
- abuse city
- Durham
- abuse country
- US
- admin name
- NCREN Hostmaster
- admin email
- hostmaster@ncren.net
- admin phone
- +1-919-248-4111
- admin kind
- role
- admin city
- Durham
- admin country
- US
- tech
- NH34-ORG-ARIN
- tech name
- NCREN Hostmaster
- tech email
- hostmaster@ncren.net
- tech phone
- +1-919-248-4111
- tech kind
- role
- tech city
- Durham
- 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.
- VPN IP309watchguard, best_proxy_switcher0.02%
- geonode, anyip, floppydata0.03%
- floppydata0.00%
- None here
- None here
- None here
- Hosting IP33,7921.73%
- None here
- None here
- None here
- SSH IP15,5760.80%
- SMTP IP15,3970.79%
- 0.01%
IPv4 prefixes
Every IPv4 prefix BGP Route saw it announce. A prefix another AS also announces says so.
IPv6 prefixes
Every IPv6 prefix BGP Route saw it announce.
| PREFIX | COUNTRY | RPKI | PEERS | FIRST SEEN |
|---|---|---|---|---|
| 2600:2700::/28 | United States | valid | 20 | 2026-10-02 |
| 2602:f64d::/40 | United States | valid | 18 | 2026-10-02 |
| 2602:f6b8::/40 | United States | not found | 20 | 2026-10-02 |
| 2610:28::/32 | United States | valid | 20 | 2026-10-02 |
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