IPv4 prefix

81.17.0.0/20

IP Prefix (CIDR): 81.17.0.0/20
Subnet Mask: 255.255.240.0
Address Count: 4,096
IP Range: 81.17.0.0 - 81.17.15.255
Subnet calculator: Calculate subnet details

Registration 1 of 2

Owner: JSC "ER-Telecom Holding"
Handle: ORG-RA21-RIPE
Country: Russian Federation (RU)
Address: Shosse Kosmonavtov, 111i, bldg. 2, office 509 614066 Perm RUSSIAN FEDERATION
Registry: RIPENCC
Registered Prefix: 81.17.0.0/20 (81.17.0.0 - 81.17.15.255)

Registration 2 of 2

Handle: TRON-MNT
Country: Russian Federation (RU)
Registry: RIPENCC
Registered Prefixes: 81.17.0.0/26 (81.17.0.0 - 81.17.0.63)
81.17.0.64/27 (81.17.0.64 - 81.17.0.95)
81.17.0.96/27 (81.17.0.96 - 81.17.0.127)
81.17.0.128/26 (81.17.0.128 - 81.17.0.191)
81.17.0.192/26 (81.17.0.192 - 81.17.0.255)
81.17.2.0/26 (81.17.2.0 - 81.17.2.63)
81.17.2.64/26 (81.17.2.64 - 81.17.2.127)
81.17.2.128/26 (81.17.2.128 - 81.17.2.191)
81.17.2.192/28 (81.17.2.192 - 81.17.2.207)
81.17.2.208/28 (81.17.2.208 - 81.17.2.223)
81.17.2.224/28 (81.17.2.224 - 81.17.2.239)
81.17.3.0/28 (81.17.3.0 - 81.17.3.15)
81.17.3.16/29 (81.17.3.16 - 81.17.3.23)
81.17.3.96/27 (81.17.3.96 - 81.17.3.127)
81.17.3.128/26 (81.17.3.128 - 81.17.3.191)
81.17.3.192/26 (81.17.3.192 - 81.17.3.255)
81.17.4.0/26 (81.17.4.0 - 81.17.4.63)
81.17.4.64/27 (81.17.4.64 - 81.17.4.95)
81.17.4.96/28 (81.17.4.96 - 81.17.4.111)
81.17.4.112/29 (81.17.4.112 - 81.17.4.119)
81.17.4.120/30 (81.17.4.120 - 81.17.4.123)
81.17.4.124/30 (81.17.4.124 - 81.17.4.127)
81.17.4.128/25 (81.17.4.128 - 81.17.4.255)
81.17.5.0/24 (81.17.5.0 - 81.17.5.255)
81.17.6.0/28 (81.17.6.0 - 81.17.6.15)
81.17.6.40/29 (81.17.6.40 - 81.17.6.47)
81.17.6.48/29 (81.17.6.48 - 81.17.6.55)
81.17.6.56/29 (81.17.6.56 - 81.17.6.63)
81.17.6.64/29 (81.17.6.64 - 81.17.6.71)
81.17.6.72/29 (81.17.6.72 - 81.17.6.79)
81.17.6.80/29 (81.17.6.80 - 81.17.6.87)
81.17.6.128/29 (81.17.6.128 - 81.17.6.135)
81.17.6.136/29 (81.17.6.136 - 81.17.6.143)
81.17.6.160/28 (81.17.6.160 - 81.17.6.175)
81.17.6.176/29 (81.17.6.176 - 81.17.6.183)
81.17.6.184/29 (81.17.6.184 - 81.17.6.191)
81.17.6.192/29 (81.17.6.192 - 81.17.6.199)
81.17.6.200/29 (81.17.6.200 - 81.17.6.207)
81.17.6.224/28 (81.17.6.224 - 81.17.6.239)
81.17.7.0/24 (81.17.7.0 - 81.17.7.255)
81.17.8.0/23 (81.17.8.0 - 81.17.9.255)
81.17.10.0/24 (81.17.10.0 - 81.17.10.255)
81.17.11.64/27 (81.17.11.64 - 81.17.11.95)
81.17.12.0/27 (81.17.12.0 - 81.17.12.31)
81.17.12.32/29 (81.17.12.32 - 81.17.12.39)
81.17.12.232/29 (81.17.12.232 - 81.17.12.239)
81.17.12.240/28 (81.17.12.240 - 81.17.12.255)
81.17.13.32/28 (81.17.13.32 - 81.17.13.47)
81.17.13.48/29 (81.17.13.48 - 81.17.13.55)
81.17.13.56/29 (81.17.13.56 - 81.17.13.63)
81.17.13.80/29 (81.17.13.80 - 81.17.13.87)
81.17.13.128/27 (81.17.13.128 - 81.17.13.159)
81.17.13.176/28 (81.17.13.176 - 81.17.13.191)
81.17.14.0/24 (81.17.14.0 - 81.17.14.255)
81.17.15.224/27 (81.17.15.224 - 81.17.15.255)
Delegated Prefix: 81.17.0.0/20 (81.17.0.0 - 81.17.15.255)

Announced Prefix	Relationship	Origin ASN	Description	Country	First Address	Last Address
81.17.0.0/20	Exact	AS24588	JSC ER-Telecom Holding	Russian Federation (RU)	81.17.0.0	81.17.15.255
81.17.1.0/24	More specific	AS21353	JSC ER-Telecom Holding	Russian Federation (RU)	81.17.1.0	81.17.1.255