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.
- Baseline (neutral) 65
- Long-established allocation (33y) +6
- Has a reverse-DNS (PTR) record +5
- Enterprise allocation +4
- Trust score 80 / 100
Experimental · trust-vectors model v1.3.0 — a transparent heuristic, not a definitive verdict. How it works →
Ranges inside 51.199.88.0/21
| CIDR | IPs | Organization | ASN | Country |
|---|---|---|---|---|
| 51.199.88.0/22 | 1.0K | Sky UK Limited | AS5607 | GB |
| 51.199.92.0/23 | 512 | Sky UK Limited | AS5607 | GB |
| 51.199.94.0/24 | 256 | Sky UK Limited | AS5607 | GB |
| 51.199.95.0/25 | 128 | Sky UK Limited | AS5607 | GB |
| 51.199.95.192/26 | 64 | Sky UK Limited | AS5607 | GB |
| 51.199.95.160/27 | 32 | Sky UK Limited | AS5607 | GB |
| 51.199.95.128/28 | 16 | Sky UK Limited | AS5607 | GB |
| 51.199.95.144/29 | 8 | Sky UK Limited | AS5607 | GB |
| 51.199.95.156/30 | 4 | Sky UK Limited | AS5607 | GB |
| 51.199.95.152/31 | 2 | Sky UK Limited | AS5607 | GB |
| 51.199.95.154/32 | 1 | Sky UK Limited | AS5607 | GB |
| 51.199.95.155/32 | 1 | Sky UK Limited | AS5607 | GB |
First and last addresses in 51.199.88.0/21
51.199.88.0/21 runs from 51.199.88.0 to 51.199.95.255.
BGP Routing
Live BGP anomalies →Not announced as an exact prefix — covered by the announced supernet 51.199.0.0/17.
RIR Ownership History
Atom feed ⇲Allocation changes captured from regional internet registry (RIR) delegation files, re-imported every six hours.
| Date | Event | From | To |
|---|---|---|---|
| 2026-05-10 | New Allocation | — | GB |
Frequently Asked Questions
What is 51.199.88.0/21?
51.199.88.0/21 is a CIDR network block containing 2,048 IPv4 addresses (from 51.199.88.0 to 51.199.95.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.
Who owns the 51.199.88.0/21 network?
The 51.199.88.0/21 range is allocated to Sky UK Limited and announced via AS5607 from Ireland.
