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
- Has a reverse-DNS (PTR) record +5
- Enterprise allocation +4
- Established allocation (11y) +3
- Trust score 77 / 100
Experimental · trust-vectors model v1.3.0 — a transparent heuristic, not a definitive verdict. How it works →
Ranges inside 157.240.248.0/21
| CIDR | IPs | Organization | ASN | Country |
|---|---|---|---|---|
| 157.240.248.0/22 | 1.0K | Facebook, Inc. | AS32934 | US |
| 157.240.252.0/23 | 512 | Facebook, Inc. | AS32934 | US |
| 157.240.254.0/24 | 256 | Facebook, Inc. | AS32934 | US |
| 157.240.255.0/24 | 256 | Facebook, Inc. | AS32934 | US |
First and last addresses in 157.240.248.0/21
157.240.248.0/21 runs from 157.240.248.0 to 157.240.255.255.
BGP Routing
Live BGP anomalies →Not announced as an exact prefix — covered by the announced supernet 157.240.192.0/18.
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 | — | US |
Frequently Asked Questions
What is 157.240.248.0/21?
157.240.248.0/21 is a CIDR network block containing 2,048 IPv4 addresses (from 157.240.248.0 to 157.240.255.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.
Who owns the 157.240.248.0/21 network?
The 157.240.248.0/21 range is allocated to Facebook, Inc. and announced via AS32934 from United States.
