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CIDR Range

37.71.100.64/26

64 IPs /26 Societe Francaise Du Radiotelephone - SFR SA AS15557 France RIPE
Addresses
64
64
IP Range
37.71.100.64
→ 37.71.100.127
Sub-ranges
0+
within this block
PTR Density
100.0%
64 of 64 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.

73/100
Moderate
How this score is built

Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →

Geolocation

All 64 IP addresses in 37.71.100.64/26

37.71.100.64 37.71.100.65 37.71.100.66 37.71.100.67 37.71.100.68 37.71.100.69 37.71.100.70 37.71.100.71 37.71.100.72 37.71.100.73 37.71.100.74 37.71.100.75 37.71.100.76 37.71.100.77 37.71.100.78 37.71.100.79 37.71.100.80 37.71.100.81 37.71.100.82 37.71.100.83 37.71.100.84 37.71.100.85 37.71.100.86 37.71.100.87 37.71.100.88 37.71.100.89 37.71.100.90 37.71.100.91 37.71.100.92 37.71.100.93 37.71.100.94 37.71.100.95 37.71.100.96 37.71.100.97 37.71.100.98 37.71.100.99 37.71.100.100 37.71.100.101 37.71.100.102 37.71.100.103 37.71.100.104 37.71.100.105 37.71.100.106 37.71.100.107 37.71.100.108 37.71.100.109 37.71.100.110 37.71.100.111 37.71.100.112 37.71.100.113 37.71.100.114 37.71.100.115 37.71.100.116 37.71.100.117 37.71.100.118 37.71.100.119 37.71.100.120 37.71.100.121 37.71.100.122 37.71.100.123 37.71.100.124 37.71.100.125 37.71.100.126 37.71.100.127

BGP Routing

Live BGP anomalies →

Not announced as an exact prefix — covered by the announced supernet 37.64.0.0/13.

Announced prefix
37.64.0.0/13
Origin AS
AS15557
Announcement samples
4,527
Last seen
2026-07-23 13:31:12

Frequently Asked Questions

What is 37.71.100.64/26?

37.71.100.64/26 is a CIDR network block containing 64 IPv4 addresses (from 37.71.100.64 to 37.71.100.127). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 37.71.100.64/26 network?

The 37.71.100.64/26 range is allocated to Societe Francaise Du Radiotelephone - SFR SA and announced via AS15557 from France.

How many IP addresses are in 37.71.100.64/26?

37.71.100.64/26 contains exactly 64 usable IPv4 addresses. A /26 prefix length means 64 addresses are covered by this single routing entry.

Last updated: 2026-07-23 13:40:37 UTC
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