CIDR Range
139.13.128.0/20
Addresses
4,096
4.1K
Sub-ranges
2+
within this block
PTR Density
14.1%
576 of 4.1K IPs have PTR
Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
76/100
Moderate
How this score is built
- Baseline (neutral) 65
- Long-established allocation (42y) +6
- Has a reverse-DNS (PTR) record +5
- Trust score 76 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Ranges inside 139.13.128.0/20
| CIDR | IPs | Organization | ASN | Country |
|---|---|---|---|---|
| 139.13.128.0/21 | 2.0K | Verein zur Foerderung eines Deutschen Forschungsnetzes e.V. | AS680 | DE |
| 139.13.136.0/21 | 2.0K | Verein zur Foerderung eines Deutschen Forschungsnetzes e.V. | AS680 | DE |
Geolocation
First 256 of 4,096 IP addresses in 139.13.128.0/20
139.13.128.0
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139.13.128.255
+ 3.8K more (range too large to list inline)
BGP Routing
Live BGP anomalies →Not announced as an exact prefix — covered by the announced supernet 139.13.0.0/16.
RIR Ownership History
Atom feed ⇲Allocation changes captured weekly from regional internet registry (RIR) delegation files.
| Date | Event | From | To |
|---|---|---|---|
| 2026-05-10 | RIR Transfer | arin | ripe |
Frequently Asked Questions
What is 139.13.128.0/20?
139.13.128.0/20 is a CIDR network block containing 4,096 IPv4 addresses (from 139.13.128.0 to 139.13.143.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.
Who owns the 139.13.128.0/20 network?
The 139.13.128.0/20 range is allocated to Verein zur Foerderung eines Deutschen Forschungsnetzes e.V. and announced via AS680 from Germany.
Last updated: 2026-07-24 08:40:31 UTC
