DFN Systems
Cluster stats
| Netblocks | 64 |
| All fragments | 121 blocks across 12 clusters |
| Cluster ID | 191603569 |
| Registry | APNIC |
| Customers | find customers using this network → |
Evidence & provenance ?
| Attribution | unresolved |
| Shared handles | clustered on 31 shared RIR contact/maintainer handles |
| Registry names | 13 distinct registrant names across these blocks |
| full provenance (JSON) → · how attribution works | |
IP Ranges (64)
showing 50 of 64 — see all — ⬇ export CSV| CIDR | Org name | Registry | Status | Confidence |
|---|---|---|---|---|
| 74.116.128.0/21 | DFN Systems | BGP | ANNOUNCED | ● high |
| 199.83.116.0/22 | DFN Systems | BGP | ANNOUNCED | ● high |
| 208.99.24.0/22 | DFN Systems | ARIN | ● high | |
| 27.131.12.0/24 | DFN-BD | APNIC | ALLOCATED NON-PORTABLE | ● low |
| 27.131.13.0/24 | DFN-BD | APNIC | ALLOCATED NON-PORTABLE | ● low |
| 27.131.14.0/24 | DFN-BD | APNIC | ALLOCATED NON-PORTABLE | ● low |
| 27.131.15.0/24 | DFN-BD | APNIC | ALLOCATED NON-PORTABLE | ● low |
| 45.127.244.0/24 | DFN-BD | APNIC | ALLOCATED NON-PORTABLE | ● low |
| 45.127.245.0/24 | DFN-BD | APNIC | ALLOCATED NON-PORTABLE | ● low |
| 45.127.246.0/24 | DFN-BD | APNIC | ALLOCATED NON-PORTABLE | ● low |
| 45.127.247.0/24 | DFN-BD | APNIC | ALLOCATED NON-PORTABLE | ● low |
| 103.81.196.0/22 | DFN Media | APNIC | ALLOCATED PORTABLE | ● low |
| 103.81.196.0/24 | DFN-BD | APNIC | ALLOCATED NON-PORTABLE | ● low |
| 103.81.197.0/24 | DFN-BD | APNIC | ALLOCATED NON-PORTABLE | ● low |
| 103.81.198.0/24 | DFN-BD | APNIC | ALLOCATED NON-PORTABLE | ● low |
| 103.81.199.0/24 | DFN-BD | APNIC | ALLOCATED NON-PORTABLE | ● low |
| 103.136.158.0/24 | DFN-BD | APNIC | ALLOCATED NON-PORTABLE | ● low |
| 103.196.232.0/24 | DFN-BD | APNIC | ALLOCATED NON-PORTABLE | ● low |
| 103.196.233.0/24 | DFN-BD | APNIC | ALLOCATED NON-PORTABLE | ● low |
| 103.196.234.0/24 | DFN-BD | APNIC | ALLOCATED NON-PORTABLE | ● low |
| 103.196.235.0/24 | DFN-BD | APNIC | ALLOCATED NON-PORTABLE | ● low |
| 103.206.17.0/24 | DFN-BD | APNIC | ALLOCATED NON-PORTABLE | ● low |
| 141.39.219.0/24 | DFN-MSP | RIPE | LEGACY | ● low |
| 193.174.1.160/28 | DFN-NOC | RIPE | ASSIGNED PA | ● low |
| 193.174.1.224/27 | DFN-MSP | RIPE | ASSIGNED PA | ● low |
| 193.174.10.0/26 | DFN-GTS | RIPE | ASSIGNED PA | ● low |
| 193.174.247.0/24 | DFN-NOC | RIPE | ASSIGNED PA | ● low |
| 194.94.252.0/24 | DFN-GS-S | RIPE | ASSIGNED PA | ● low |
| 194.95.252.0/24 | DFN-GS-B | RIPE | ASSIGNED PA | ● low |
| 195.37.61.224/27 | DFN-NOC | RIPE | ASSIGNED PA | ● low |
| 195.37.186.32/28 | DFN-SOC | RIPE | ASSIGNED PA | ● low |
| 195.37.186.160/28 | DFN-VDI-TZ | RIPE | ASSIGNED PA | ● low |
| 195.37.191.32/28 | DFN-SGS | RIPE | ASSIGNED PA | ● low |
| 195.37.209.100/30 | DFN-NOC | RIPE | ASSIGNED PA | ● low |
| 195.37.209.112/30 | DFN-NOC | RIPE | ASSIGNED PA | ● low |
| 195.37.232.224/28 | DFN-NOC | RIPE | ASSIGNED PA | ● low |
| 212.201.255.0/24 | DFN-LAB | RIPE | ASSIGNED PA | ● low |
| 2001:638:823::/48 | DFN-GTS | RIPE | ASSIGNED | ● low |
| 2400:7c40::/32 | DFN Media | APNIC | ALLOCATED PORTABLE | ● low |
| 2401:c5c0::/48 | DFN-BD | APNIC | ALLOCATED NON-PORTABLE | ● low |
| 2401:c5c0:1::/48 | DFN-BD | APNIC | ALLOCATED NON-PORTABLE | ● low |
| 2401:c5c0:2::/48 | DFN-BD | APNIC | ALLOCATED NON-PORTABLE | ● low |
| 2401:c5c0:3::/48 | DFN-BD | APNIC | ALLOCATED NON-PORTABLE | ● low |
| 2401:c5c0:4::/48 | DFN-BD | APNIC | ALLOCATED NON-PORTABLE | ● low |
| 2401:c5c0:5::/48 | DFN-BD | APNIC | ALLOCATED NON-PORTABLE | ● low |
| 2401:c5c0:6::/48 | DFN-BD | APNIC | ALLOCATED NON-PORTABLE | ● low |
| 2401:c5c0:7::/48 | DFN-BD | APNIC | ALLOCATED NON-PORTABLE | ● low |
| 2401:c5c0:11::/48 | DFN-BD | APNIC | ALLOCATED NON-PORTABLE | ● low |
| 2401:c5c0:12::/48 | DFN-BD | APNIC | ALLOCATED NON-PORTABLE | ● low |
| 2401:c5c0:13::/48 | DFN-BD | APNIC | ALLOCATED NON-PORTABLE | ● low |
Network trust
what's this?
RPKI hygiene: A
how networks compare →
98.4%
of checked blocks have valid RPKI ROA coverage
(63 of 64)
Possible discrepancies (50)
These blocks are registered to DFN Systems but cryptographically authorized for a different, unrelated network (2 distinct holders) — often M&A history, multi-homing, or outsourced/managed hosting, occasionally worth a closer look.
| 2001:638:823::/48 /48 | authorized for AS680 — Verein zur Foerderung eines Deutschen Forschungsnetzes e.V. |
| 2401:c5c0::/48 /48 | authorized for AS55492 — Dhaka Fiber Net Ltd |
| 2401:c5c0:1::/48 /48 | authorized for AS55492 — Dhaka Fiber Net Ltd |
| 2401:c5c0:2::/48 /48 | authorized for AS55492 — Dhaka Fiber Net Ltd |
| 2401:c5c0:3::/48 /48 | authorized for AS55492 — Dhaka Fiber Net Ltd |
| 2401:c5c0:4::/48 /48 | authorized for AS55492 — Dhaka Fiber Net Ltd |
| 2401:c5c0:5::/48 /48 | authorized for AS55492 — Dhaka Fiber Net Ltd |
| 2401:c5c0:6::/48 /48 | authorized for AS55492 — Dhaka Fiber Net Ltd |
| 2401:c5c0:7::/48 /48 | authorized for AS55492 — Dhaka Fiber Net Ltd |
| 2401:c5c0:12::/48 /48 | authorized for AS55492 — Dhaka Fiber Net Ltd |
| 2401:c5c0:13::/48 /48 | authorized for AS55492 — Dhaka Fiber Net Ltd |
| 2401:c5c0:14::/48 /48 | authorized for AS55492 — Dhaka Fiber Net Ltd |
| 2401:c5c0:11::/48 /48 | authorized for AS55492 — Dhaka Fiber Net Ltd |
| 2401:c5c0:16::/48 /48 | authorized for AS55492 — Dhaka Fiber Net Ltd |
| 2401:c5c0:100::/48 /48 | authorized for AS55492 — Dhaka Fiber Net Ltd |
+35 more — see the REST API
NIC Handles
AB1011-AP
AD729-AP
AD729-AP
AD816-AP
AKMR1-AP
AKMR1-AP
APNIC-HM
AS53266
AU326-AP
BONA1-AP
BONA1-AP
CJG33-ARIN
+19 more