AS21835 Scarsdale Security Systems, Inc.

SCARSDALE-SECURITY-SYSTEMS - Scarsdale Security Systems, Inc. · registered in the United States

IPv4 addresses1,0241 prefixes · <0.001% of announced IPv4

Rank in United States#7,775largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#30,317of 79,396 networks with IPv4

IPv61 x /32 (65,536 x /48)1 prefixes

CountryUnited States18,679 ASNs registered there

Open AS21835 in ASN lookup Look up an IP in this network (199.16.212.1) All networks in United States

IPv4 prefixes

All 1 prefix, in address order.

199.16.212.0/22

IPv6 prefixes

All 1 prefix.

2605:d4c0::/32

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IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources