Core Site
CoreSite
Data as of 2026-09-06
Registry
This organisation
| Netblocks | 153 · 54,026 IPv4 addresses |
| IPv6 | 52 prefixes (largest 2604:3fc0::/32) |
| Also registered under this name | 160 netblocks across 2 separate records |
| Record ID | 236378315 |
| Registry | BGP |
| Customers | see who runs inside this network → |
Evidence & provenance ?
| Attribution | Registry record |
| Shared handles | clustered on 12 shared RIR contact/maintainer handles |
| Registry names | 3 distinct registrant names across these blocks |
| full provenance (JSON) → · how attribution works · report an issue | |
IP Ranges (153)
⬇ export CSV| CIDR | Org name | Registry | Status | Confidence |
|---|---|---|---|---|
| 66.35.64.0/23 | CoreSite | BGP | ANNOUNCED | ● high |
| 66.35.66.0/24 | CoreSite | BGP | ANNOUNCED | ● high |
| 66.35.67.0/24 | CoreSite | BGP | ANNOUNCED | ● high |
| 66.35.68.0/22 | CoreSite | BGP | ANNOUNCED | ● high |
| 66.35.72.0/21 | CoreSite | BGP | ANNOUNCED | ● high |
| 66.35.80.0/24 | CoreSite | BGP | ANNOUNCED | ● high |
| 66.35.83.0/24 | CoreSite | BGP | ANNOUNCED | ● high |
| 66.35.84.0/23 | CoreSite | BGP | ANNOUNCED | ● high |
| 66.35.86.0/24 | CoreSite | BGP | ANNOUNCED | ● high |
| 66.35.87.0/24 | CoreSite | BGP | ANNOUNCED | ● high |
| 66.35.88.0/21 | CoreSite | BGP | ANNOUNCED | ● high |
| 66.128.144.0/23 | CoreSite | BGP | ANNOUNCED | ● high |
| 66.128.146.0/24 | CoreSite | BGP | ANNOUNCED | ● high |
| 66.128.147.0/24 | CoreSite | BGP | ANNOUNCED | ● high |
| 66.128.148.0/22 | CoreSite | BGP | ANNOUNCED | ● high |
| 66.128.152.0/23 | CoreSite | BGP | ANNOUNCED | ● high |
| 66.128.154.0/24 | CoreSite | BGP | ANNOUNCED | ● high |
| 66.128.155.0/24 | CoreSite | BGP | ANNOUNCED | ● high |
| 66.128.156.0/22 | CoreSite | BGP | ANNOUNCED | ● high |
| 67.212.144.0/23 | CoreSite | BGP | ANNOUNCED | ● high |
| 67.212.146.0/23 | CoreSite | BGP | ANNOUNCED | ● high |
| 67.212.148.0/23 | CoreSite | BGP | ANNOUNCED | ● high |
| 67.212.150.0/24 | CoreSite | BGP | ANNOUNCED | ● high |
| 67.212.151.0/24 | CoreSite | BGP | ANNOUNCED | ● high |
| 67.212.152.0/24 | CoreSite | BGP | ANNOUNCED | ● high |
| 67.212.153.0/24 | CoreSite | BGP | ANNOUNCED | ● high |
| 67.212.154.0/24 | CoreSite | BGP | ANNOUNCED | ● high |
| 67.212.155.0/24 | CoreSite | BGP | ANNOUNCED | ● high |
| 67.212.156.0/23 | CoreSite | BGP | ANNOUNCED | ● high |
| 67.212.158.0/23 | CoreSite | BGP | ANNOUNCED | ● high |
| 98.158.144.0/22 | CoreSite | BGP | ANNOUNCED | ● high |
| 98.158.144.0/23 | CoreSite | BGP | ANNOUNCED | ● high |
| 98.158.148.0/24 | CoreSite | BGP | ANNOUNCED | ● high |
| 98.158.149.0/24 | CoreSite | BGP | ANNOUNCED | ● high |
| 98.158.150.0/23 | CoreSite | BGP | ANNOUNCED | ● high |
| 98.158.152.0/22 | CoreSite | BGP | ANNOUNCED | ● high |
| 98.158.156.0/24 | CoreSite | BGP | ANNOUNCED | ● high |
| 98.158.157.0/24 | CoreSite | BGP | ANNOUNCED | ● high |
| 98.158.158.0/23 | CoreSite | BGP | ANNOUNCED | ● high |
| 142.255.192.0/18 | CoreSite | BGP | ANNOUNCED | ● high |
| 149.112.11.61/32 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 149.112.69.99/32 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 149.112.192.19/32 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 162.216.127.0/24 | CoreSite | BGP | ANNOUNCED | ● high |
| 173.45.170.0/24 | CoreSite | BGP | ANNOUNCED | ● high |
| 173.45.174.0/24 | CoreSite | BGP | ANNOUNCED | ● high |
| 173.45.175.0/24 | CoreSite | BGP | ANNOUNCED | ● high |
| 192.34.20.0/23 | CoreSite | BGP | ANNOUNCED | ● high |
| 192.34.22.0/23 | CoreSite | BGP | ANNOUNCED | ● high |
| 192.150.41.0/24 | CoreSite | BGP | ANNOUNCED | ● high |
| 198.32.161.41/32 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 199.119.180.0/22 | CoreSite | BGP | ANNOUNCED | ● high |
| 199.197.10.0/23 | CoreSite | BGP | ANNOUNCED | ● high |
| 204.9.200.0/22 | CoreSite | BGP | ANNOUNCED | ● high |
| 204.9.204.0/24 | CoreSite | BGP | ANNOUNCED | ● high |
| 204.9.206.0/24 | CoreSite | BGP | ANNOUNCED | ● high |
| 204.9.207.0/24 | CoreSite | BGP | ANNOUNCED | ● high |
| 206.41.108.19/32 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 206.41.110.27/32 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 206.51.40.241/32 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 206.51.40.242/32 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 206.51.40.243/32 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 206.51.40.244/32 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 206.51.40.245/32 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 206.51.40.246/32 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 206.51.40.247/32 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 206.51.40.248/32 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 206.51.43.244/32 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 206.51.43.245/32 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 206.51.46.244/32 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 206.51.46.245/32 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 206.53.143.10/32 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 206.71.12.99/32 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 206.72.210.244/32 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 206.72.211.115/32 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 206.72.211.248/32 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 206.72.211.249/32 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 206.83.43.19/32 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 206.197.187.10/32 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 206.223.143.0/24 | CoreSite | BGP | ANNOUNCED | ● high |
| 208.64.248.0/24 | CoreSite | BGP | ANNOUNCED | ● high |
| 208.64.251.0/24 | CoreSite | BGP | ANNOUNCED | ● high |
| 208.64.252.0/23 | CoreSite | BGP | ANNOUNCED | ● high |
| 208.64.254.0/23 | CoreSite | BGP | ANNOUNCED | ● high |
| 208.74.72.0/22 | CoreSite | BGP | ANNOUNCED | ● high |
| 208.74.76.0/23 | CoreSite | BGP | ANNOUNCED | ● high |
| 208.74.78.0/23 | CoreSite | BGP | ANNOUNCED | ● high |
| 208.77.96.0/21 | CoreSite | BGP | ANNOUNCED | ● high |
| 208.77.96.0/23 | CoreSite | BGP | ANNOUNCED | ● high |
| 208.77.102.0/23 | CoreSite | BGP | ANNOUNCED | ● high |
| 208.78.157.0/24 | CoreSite | BGP | ANNOUNCED | ● high |
| 208.84.144.0/21 | CoreSite | BGP | ANNOUNCED | ● high |
| 2001:504:1::a500:2734:1/128 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 2001:504:13::210:244/128 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 2001:504:13::211:115/128 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 2001:504:13::211:248/128 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 2001:504:13::211:249/128 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 2001:504:13:1::241/128 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 2001:504:13:1::242/128 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 2001:504:13:1::243/128 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 2001:504:13:1::244/128 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 2001:504:13:1::245/128 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 2001:504:13:1::246/128 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 2001:504:13:1::247/128 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 2001:504:13:1::248/128 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 2001:504:13:4::244/128 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 2001:504:13:4::245/128 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 2001:504:30::ba00:2734:1/128 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 2001:504:40:12::1:99/128 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 2001:504:40:69::1:99/128 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 2001:504:40:108::1:19/128 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 2001:504:41:110::27/128 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 2001:504:47::aae:0:1/128 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 2001:504:9b::19/128 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 2001:504:102::aae:0:1/128 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 2001:505:149::19/128 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 2604:3fc0:1ab::/48 | CoreSite | BGP | ANNOUNCED | ● high |
| 2604:3fc0:2000::/36 | CoreSite | BGP | ANNOUNCED | ● high |
| 2604:3fc0:3000::/36 | CoreSite | BGP | ANNOUNCED | ● high |
| 2605:6c00::/48 | CoreSite | BGP | ANNOUNCED | ● high |
| 2605:6c00:1::/48 | CoreSite | BGP | ANNOUNCED | ● high |
| 2605:6c00:2::/48 | CoreSite | BGP | ANNOUNCED | ● high |
| 2605:6c00:3::/48 | CoreSite | BGP | ANNOUNCED | ● high |
| 2605:6c00:4::/48 | CoreSite | BGP | ANNOUNCED | ● high |
| 2605:6c00:5::/48 | CoreSite | BGP | ANNOUNCED | ● high |
| 2605:6c00:6::/48 | CoreSite | BGP | ANNOUNCED | ● high |
| 2605:6c00:7::/48 | CoreSite | BGP | ANNOUNCED | ● high |
| 2605:6c00:8::/48 | CoreSite | BGP | ANNOUNCED | ● high |
| 2605:6c00:303:303::244/128 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 2605:6c00:303:303::245/128 | CoreSite | PEERINGDB | ASSIGNED | ● high |
| 2605:6c00:1000::/36 | CoreSite | BGP | ANNOUNCED | ● high |
| 2605:6c00:2000::/36 | CoreSite | BGP | ANNOUNCED | ● high |
| 2605:6c00:3000::/36 | CoreSite | BGP | ANNOUNCED | ● high |
| 2605:6c00:4000::/36 | CoreSite | BGP | ANNOUNCED | ● high |
| 2605:6c00:5000::/36 | CoreSite | BGP | ANNOUNCED | ● high |
| 2605:6c00:6000::/36 | CoreSite | BGP | ANNOUNCED | ● high |
| 2605:6c00:7000::/36 | CoreSite | BGP | ANNOUNCED | ● high |
| 2605:6c00:8000::/36 | CoreSite | BGP | ANNOUNCED | ● high |
| 2605:6c00:a000::/36 | CoreSite | BGP | ANNOUNCED | ● high |
| 2607:2f80::/32 | CoreSite | BGP | ANNOUNCED | ● high |
| 8.47.37.0/24 | CoreSite | ARIN | ASSIGNMENT | ● medium |
| 66.35.64.0/19 | CoreSite | ARIN | DIRECT ALLOCATION | ● medium |
| 66.128.144.0/20 | CoreSite | ARIN | DIRECT ALLOCATION | ● medium |
| 67.212.144.0/20 | CoreSite | ARIN | DIRECT ALLOCATION | ● medium |
| 149.112.21.0/24 | CoreSite | ARIN | DIRECT ALLOCATION | ● medium |
| 173.45.174.0/23 | CoreSite | ARIN | DIRECT ALLOCATION | ● medium |
| 206.51.40.0/21 | CoreSite | ARIN | DIRECT ALLOCATION | ● medium |
| 206.72.210.0/23 | CoreSite | ARIN | DIRECT ALLOCATION | ● medium |
| 206.123.24.0/24 | CoreSite | ARIN | DIRECT ALLOCATION | ● medium |
| 2001:504:13::/48 | CoreSite | ARIN | DIRECT ALLOCATION | ● medium |
| 2001:504:28::/48 | CoreSite | ARIN | DIRECT ALLOCATION | ● medium |
| 2604:3fc0::/32 | CoreSite | ARIN | DIRECT ALLOCATION | ● medium |
| 2605:6c00::/32 | CoreSite | ARIN | DIRECT ALLOCATION | ● medium |
IPv6 ranges (52)
showing the 15 largest allocationsFootprint over time
6 weekly snapshots · JSON
159
+12 netblocks since 2026-07-26
2026-07-26
peak 159
2026-09-06
Domains hosted in this network
what's this?Customer-delegated space
how is this classified?
Unclassified
107 (69.9%)
Operator infrastructure (named)
52 (34.0%)
Network trust
what's this?
RPKI hygiene: B
how networks compare →
88.1%
of checked blocks have valid RPKI ROA coverage
(140 of 159)
No discrepancies found among checked blocks.
NIC Handles
AS22437
AS2734
AS2734
CMM8-ARIN
CORES4-ARIN
CORES5-ARIN
COWIL
JENSE37-ARIN
JFA116-ARIN
JFA116-ARIN
REEDC55-ARIN
STANL503-ARIN