asn.dev

Address space

AS1103 SURFNET-NL SURFnet, The Netherlands

IPv4 prefixes 144 7.20M addresses
IPv6 prefixes 14
Most common size /16 IPv4
Flagged 11

Shape

Prefix sizes

IPv4
/12
/12: 2
2
/14
/14: 3
3
/15
/15: 7
7
/16
/16: 42
42
/17
/17: 10
10
/18
/18: 11
11
/19
/19: 8
8
/20
/20: 8
8
/21
/21: 10
10
/22
/22: 9
9
/23
/23: 10
10
/24
/24: 13
13
/25
/25: 2
2
/26
/26: 2
2
/27
/27: 2
2
/28
/28: 1
1
/29
/29: 1
1
/30
/30: 1
1
/31
/31: 1
1
/32
/32: 1
1

How this network carves its IPv4 space. A wall of /24s usually means many small customer assignments or fine-grained traffic engineering; a few short prefixes means large contiguous allocations announced whole.

Shape

Prefix sizes

IPv6
/30
/30: 1
1
/31
/31: 1
1
/32
/32: 1
1
/33
/33: 1
1
/34
/34: 1
1
/35
/35: 1
1
/36
/36: 1
1
/37
/37: 1
1
/38
/38: 1
1
/39
/39: 1
1
/40
/40: 1
1
/41
/41: 1
1
/48
/48: 2
2

Geography

Where the space lands

CountryNamePrefixes
NLNetherlands158

Review

Flagged prefixes

11 of 158
PrefixFamilyAddressesCountryFlags
192.42.115.0/26IPv464NLToo specific
192.42.115.64/27IPv432NLToo specific
192.42.115.96/30IPv44NLToo specific
192.42.115.100/31IPv42NLToo specific
192.42.115.103/32IPv41NLToo specific
192.42.115.104/29IPv48NLToo specific
192.42.115.112/28IPv416NLToo specific
192.42.115.128/25IPv4128NLToo specific
195.169.142.32/27IPv432NLToo specific
195.169.142.64/26IPv464NLToo specific
195.169.142.128/25IPv4128NLToo specific

A flag is an observation, not an accusation. Very large and very specific prefixes are both legitimate in the right context.

Inventory

All prefixes

158 total
PrefixFamilyAddressesCountryFlags
129.125.0.0/16IPv465,536NL
130.37.0.0/16IPv465,536NL
131.174.0.0/16IPv465,536NL
131.211.0.0/16IPv465,536NL
131.224.0.0/16IPv465,536NL
132.229.0.0/16IPv465,536NL
134.221.0.0/16IPv465,536NL
136.231.0.0/16IPv465,536NL
137.56.0.0/16IPv465,536NL
137.120.0.0/16IPv465,536NL
137.224.0.0/16IPv465,536NL
139.63.0.0/16IPv465,536NL
141.252.0.0/16IPv465,536NL
143.121.0.0/16IPv465,536NL
145.0.0.0/16IPv465,536NL
145.1.0.0/17IPv432,768NL
145.2.0.0/15IPv4131,072NL
145.5.0.0/16IPv465,536NL
145.9.0.0/16IPv465,536NL
145.19.0.0/16IPv465,536NL
145.20.0.0/16IPv465,536NL
145.23.0.0/16IPv465,536NL
145.24.0.0/16IPv465,536NL
145.28.0.0/15IPv4131,072NL
145.33.0.0/16IPv465,536NL
145.37.0.0/16IPv465,536NL
145.38.0.0/15IPv4131,072NL
145.41.0.0/16IPv465,536NL
145.44.0.0/16IPv465,536NL
145.48.0.0/15IPv4131,072NL
145.51.0.0/16IPv465,536NL
145.52.0.0/16IPv465,536NL
145.74.0.0/15IPv4131,072NL
145.76.0.0/16IPv465,536NL
145.81.0.0/16IPv465,536NL
145.85.0.0/16IPv465,536NL
145.88.0.0/14IPv4262,144NL
145.92.0.0/15IPv4131,072NL
145.95.0.0/16IPv465,536NL
145.96.0.0/16IPv465,536NL
145.97.0.0/19IPv48,192NL
145.97.48.0/20IPv44,096NL
145.97.64.0/18IPv416,384NL
145.97.128.0/17IPv432,768NL
145.98.8.0/21IPv42,048NL
145.98.17.0/24IPv4256NL
145.98.18.0/23IPv4512NL
145.98.20.0/22IPv41,024NL
145.98.24.0/21IPv42,048NL
145.98.32.0/19IPv48,192NL
145.98.64.0/18IPv416,384NL
145.98.128.0/17IPv432,768NL
145.100.0.0/18IPv416,384NL
145.100.64.0/19IPv48,192NL
145.100.96.0/20IPv44,096NL
145.100.112.0/22IPv41,024NL
145.100.116.0/23IPv4512NL
145.100.119.0/24IPv4256NL
145.100.120.0/21IPv42,048NL
145.100.128.0/17IPv432,768NL
145.101.0.0/16IPv465,536NL
145.102.2.0/23IPv4512NL
145.102.6.0/23IPv4512NL
145.102.8.0/21IPv42,048NL
145.102.16.0/20IPv44,096NL
145.102.32.0/19IPv48,192NL
145.102.64.0/18IPv416,384NL
145.102.128.0/17IPv432,768NL
145.103.0.0/16IPv465,536NL
145.107.0.0/22IPv41,024NL
145.107.8.0/21IPv42,048NL
145.107.16.0/21IPv42,048NL
145.107.24.0/22IPv41,024NL
145.107.28.0/22IPv41,024NL
145.107.32.0/19IPv48,192NL
145.107.64.0/18IPv416,384NL
145.107.128.0/17IPv432,768NL
145.108.0.0/16IPv465,536NL
145.116.64.0/18IPv416,384NL
145.116.128.0/18IPv416,384NL
145.116.192.0/20IPv44,096NL
145.116.224.0/19IPv48,192NL
145.117.0.0/16IPv465,536NL
145.118.0.0/16IPv465,536NL
145.120.0.0/14IPv4262,144NL
145.124.0.0/15IPv4131,072NL
145.126.0.0/16IPv465,536NL
145.127.0.0/17IPv432,768NL
145.136.0.0/16IPv465,536NL
145.137.0.0/17IPv432,768NL
145.137.128.0/18IPv416,384NL
145.137.192.0/18IPv416,384NL
145.138.0.0/16IPv465,536NL
145.140.0.0/14IPv4262,144NL
145.144.0.0/12IPv41,048,576NL
145.160.0.0/12IPv41,048,576NL
156.83.0.0/16IPv465,536NL
192.16.188.0/23IPv4512NL
192.31.231.0/24IPv4256NL
192.33.36.0/24IPv4256NL
192.42.113.0/24IPv4256NL
192.42.114.0/24IPv4256NL
192.42.115.0/26IPv464NLToo specific
192.42.115.64/27IPv432NLToo specific
192.42.115.96/30IPv44NLToo specific
192.42.115.100/31IPv42NLToo specific
192.42.115.103/32IPv41NLToo specific
192.42.115.104/29IPv48NLToo specific
192.42.115.112/28IPv416NLToo specific
192.42.115.128/25IPv4128NLToo specific
192.42.120.0/24IPv4256NL
192.42.124.0/22IPv41,024NL
192.43.212.0/24IPv4256NL
192.87.0.0/17IPv432,768NL
192.87.128.0/19IPv48,192NL
192.87.160.0/22IPv41,024NL
192.87.164.0/23IPv4512NL
192.87.167.0/24IPv4256NL
192.87.168.0/21IPv42,048NL
192.87.176.0/20IPv44,096NL
192.87.192.0/18IPv416,384NL
192.104.140.0/24IPv4256NL
193.176.235.0/24IPv4256NL
193.177.176.0/22IPv41,024NL
194.13.16.0/20IPv44,096NL
194.13.112.0/21IPv42,048NL
194.26.8.0/21IPv42,048NL
194.53.88.0/23IPv4512NL
194.53.92.0/24IPv4256NL
194.53.94.0/23IPv4512NL
194.104.124.0/23IPv4512NL
194.104.240.0/20IPv44,096NL
194.171.0.0/16IPv465,536NL
195.169.0.0/17IPv432,768NL
195.169.128.0/21IPv42,048NL
195.169.136.0/22IPv41,024NL
195.169.140.0/23IPv4512NL
195.169.142.32/27IPv432NLToo specific
195.169.142.64/26IPv464NLToo specific
195.169.142.128/25IPv4128NLToo specific
195.169.143.0/24IPv4256NL
195.169.144.0/20IPv44,096NL
195.169.160.0/19IPv48,192NL
195.169.192.0/18IPv416,384NL
2001:610::/33IPv6—NL
2001:610:8000::/36IPv6—NL
2001:610:9080::/41IPv6—NL
2001:610:9100::/40IPv6—NL
2001:610:9200::/39IPv6—NL
2001:610:9400::/38IPv6—NL
2001:610:9800::/37IPv6—NL
2001:610:a000::/35IPv6—NL
2001:610:c000::/34IPv6—NL
2001:611::/32IPv6—NL
2001:612::/31IPv6—NL
2001:614::/30IPv6—NL
2001:67c:1200::/48IPv6—NL
2001:67c:262c::/48IPv6—NL