Sistema Autônomo

AS1103

SURF B.V.

SURF B.V. The Netherlands 🌐 surf.nl

IPs Anunciados

7,195,648

Prefixos CIDR

120

ASN

AS1103

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.

57/100

Caution

How this score is built

Baseline (neutral) 65
Multiple-origin (MOAS) routing anomaly −12
Enterprise allocation +4
Trust score 57 / 100

Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →

About SURFnet

SURF is an organization that develops, implements and maintains the national research and education network (NREN) of the Netherlands. It operates the national research network formally called SURFnet.

Founded

1989

Headquarters

Utrecht

Parent

SURF (Samenwerkende Universitaire Rekenfaciliteiten)

Official website ↗ Summary from Wikipedia, CC BY-SA 4.0 · Data from Wikidata

⚠ 1 Prefixo MOAS — múltiplos ASNs de origem detectados

Todas as anomalias MOAS →

Um prefixo anteriormente estável originado por AS1103 é agora também anunciado por outro ASN (MOAS — Multiple-Origin AS), detectado a partir de nossos coletores RIPE RIS. Frequentemente benigno (anycast, multi-homing ou uma transferência recente) — mas pode sinalizar um vazamento de rota ou sequestro de prefixo, então vale a pena inspecionar.

Prefixo	ASNs de Origem	Última detecção (UTC)
145.98.16.0/24	AS1103, AS1653	2026-07-24 20:08:50

Network profile

Source: PeeringDB →

Network type Educational/Research

Traffic level 500-1000Gbps

Geographic scope Europe

Traffic ratio Mostly Inbound

Peering policy Open

IRR record AS1103:AS-SURF

Present at 3 internet exchanges: NL-ix: Main, AMS-IX, Frys-IX

Website ↗

AS1103 — pegada global de IP

Cidades onde AS1103 possui alocação IPv4 mensurável. Clique em qualquer ponto para abrir a página daquela cidade. O tamanho e a cor escalam com a contagem de IP.

Ver no globo 3D →

Principais intervalos CIDR

CIDR	IPs	PTR Density	Organização	País	State	City
145.144.0.0/12	1.05M	86.5%	SURF B.V.	NL	Gelderland	Wehl
145.160.0.0/12	1.05M	0.0%	SURF B.V.	NL	—	—
145.144.0.0/13	524.3K	73.1%	SURF B.V.	NL	Gelderland	Wehl
145.88.0.0/14	262.1K	18.5%	SURF B.V.	NL	South Holland	Leiden
145.120.0.0/14	262.1K	50.0%	SURF B.V.	NL	Gelderland	Barneveld
145.140.0.0/14	262.1K	75.0%	SURF B.V.	NL	South Holland	Rotterdam
145.148.0.0/14	262.1K	0.0%	SURF B.V.	NL	—	—
145.2.0.0/15	131.1K	25.2%	SURF B.V.	NL	Overijssel	Deventer
145.28.0.0/15	131.1K	10.8%	SURF B.V.	NL	North Holland	Spierdijk
145.38.0.0/15	131.1K	1.3%	SURF B.V.	NL	—	—
145.48.0.0/15	131.1K	0.0%	SURF B.V.	NL	North Brabant	Oosterhout
145.74.0.0/15	131.1K	14.7%	SURF B.V.	NL	Gelderland	Nijmegen
145.92.0.0/15	131.1K	0.0%	SURF B.V.	NL	North Brabant	Eindhoven
145.124.0.0/15	131.1K	0.2%	SURF B.V.	NL	—	—
145.136.0.0/15	131.1K	57.9%	SURF B.V.	NL	South Holland	Rotterdam
129.125.0.0/16	65.5K	32.7%	SURF B.V.	NL	Groningen	Groningen
130.37.0.0/16	65.5K	14.0%	SURF B.V.	NL	North Holland	Amsterdam
131.174.0.0/16	65.5K	5.4%	SURF B.V.	NL	Gelderland	Wijchen
131.211.0.0/16	65.5K	19.6%	SURF B.V.	NL	Utrecht	Utrecht
131.224.0.0/16	65.5K	0.8%	SURF B.V.	NL	Utrecht	De Bilt
132.229.0.0/16	65.5K	10.2%	SURF B.V.	NL	South Holland	Leiden
134.221.0.0/16	65.5K	3.2%	SURF B.V.	NL	—	—
136.231.0.0/16	65.5K	11.8%	SURF B.V.	NL	South Holland	Delft
137.56.0.0/16	65.5K	48.7%	SURF B.V.	NL	North Brabant	Tilburg
137.120.0.0/16	65.5K	1.8%	SURF B.V.	NL	Limburg	Maastricht
137.224.0.0/16	65.5K	0.8%	SURF B.V.	NL	Gelderland	Wageningen
139.63.0.0/16	65.5K	11.2%	SURF B.V.	NL	South Holland	Delft
141.252.0.0/16	65.5K	0.1%	SURF B.V.	NL	Friesland	Leeuwarden
143.121.0.0/16	65.5K	1.2%	SURF B.V.	NL	Utrecht	Utrecht
145.0.0.0/16	65.5K	0.4%	SURF B.V.	NL	North Holland	Amsterdam
145.5.0.0/16	65.5K	28.1%	SURF B.V.	NL	South Holland	Rotterdam
145.9.0.0/16	65.5K	0.0%	SURF B.V.	NL	—	—
145.19.0.0/16	65.5K	29.1%	SURF B.V.	NL	Zeeland	Flushing
145.20.0.0/16	65.5K	5.1%	SURF B.V.	NL	—	—
145.23.0.0/16	65.5K	0.1%	SURF B.V.	NL	Utrecht	Bilthoven
145.24.0.0/16	65.5K	18.4%	SURF B.V.	NL	North Holland	Egmond aan den Hoef
145.33.0.0/16	65.5K	0.2%	SURF B.V.	NL	Groningen	Hoogezand
145.37.0.0/16	65.5K	0.0%	SURF B.V.	NL	Groningen	Groningen
145.41.0.0/16	65.5K	0.0%	SURF B.V.	NL	—	—
145.44.0.0/16	65.5K	38.7%	SURF B.V.	NL	Overijssel	Ommen
145.51.0.0/16	65.5K	0.6%	SURF B.V.	NL	—	—
145.52.0.0/16	65.5K	1.8%	SURF B.V.	NL	South Holland	The Hague
145.76.0.0/16	65.5K	0.1%	SURF B.V.	NL	Overijssel	Hengelo
145.81.0.0/16	65.5K	61.1%	SURF B.V.	NL	North Holland	Amsterdam
145.85.0.0/16	65.5K	0.2%	SURF B.V.	NL	North Brabant	Eindhoven
145.95.0.0/16	65.5K	0.0%	SURF B.V.	NL	—	—
145.96.0.0/16	65.5K	98.5%	SURF B.V.	NL	—	—
145.101.0.0/16	65.5K	66.1%	SURF B.V.	NL	North Brabant	Breda
145.103.0.0/16	65.5K	100.0%	SURF B.V.	NL	South Holland	The Hague
145.108.0.0/16	65.5K	89.8%	SURF B.V.	NL	North Holland	Amstelveen
145.117.0.0/16	65.5K	100.0%	SURF B.V.	NL	North Holland	Amsterdam
145.118.0.0/16	65.5K	49.9%	SURF B.V.	NL	South Holland	Leiden
145.126.0.0/16	65.5K	45.0%	SURF B.V.	NL	Overijssel	Enschede
145.138.0.0/16	65.5K	74.6%	SURF B.V.	NL	Overijssel	Raalte
145.144.0.0/16	65.5K	0.0%	SURF B.V.	NL	Gelderland	Wehl
145.147.0.0/16	65.5K	0.0%	SURF B.V.	NL	—	—
156.83.0.0/16	65.5K	1.5%	SURF B.V.	NL	South Holland	Rotterdam
192.87.0.0/16	65.5K	49.8%	SURF B.V.	NL	North Holland	Amsterdam
194.171.0.0/16	65.5K	0.0%	SURF B.V.	NL	Utrecht	Utrecht
195.169.0.0/16	65.5K	25.4%	SURF B.V.	NL	Utrecht	Amersfoort
145.1.0.0/17	32.8K	0.0%	SURF B.V.	NL	North Holland	Den Hoorn
145.97.128.0/17	32.8K	96.0%	SURF B.V.	NL	Groningen	Groningen
145.98.128.0/17	32.8K	100.0%	SURF B.V.	NL	—	—
145.100.128.0/17	32.8K	45.4%	SURF B.V.	NL	Limburg	Venlo
145.107.128.0/17	32.8K	0.4%	SURF B.V.	NL	Utrecht	Utrecht
145.127.0.0/17	32.8K	100.0%	SURF B.V.	NL	Limburg	Maastricht
145.145.0.0/17	32.8K	0.0%	SURF B.V.	NL	—	—
145.146.128.0/17	32.8K	0.0%	SURF B.V.	NL	—	—
194.171.128.0/17	32.8K	50.2%	SURF B.V.	NL	Utrecht	Utrecht
145.97.64.0/18	16.4K	74.9%	SURF B.V.	NL	Overijssel	Saasveld
145.98.64.0/18	16.4K	0.3%	SURF B.V.	NL	—	—
145.100.0.0/18	16.4K	14.1%	SURF B.V.	NL	North Holland	Amsterdam
145.102.64.0/18	16.4K	64.1%	SURF B.V.	NL	North Holland	Amsterdam
145.102.192.0/18	16.4K	37.5%	SURF B.V.	NL	Gelderland	Nijmegen
145.107.64.0/18	16.4K	0.0%	SURF B.V.	NL	Utrecht	Utrecht
145.116.64.0/18	16.4K	0.0%	SURF B.V.	NL	South Holland	The Hague
145.116.128.0/18	16.4K	0.0%	SURF B.V.	NL	Gelderland	Nijmegen
145.145.192.0/18	16.4K	0.0%	SURF B.V.	NL	—	—
145.146.64.0/18	16.4K	0.0%	SURF B.V.	NL	—	—
194.171.0.0/18	16.4K	42.7%	SURF B.V.	NL	North Holland	Amsterdam
145.97.0.0/19	8.2K	31.3%	SURF B.V.	NL	Gelderland	Nijmegen
145.98.32.0/19	8.2K	100.0%	SURF B.V.	NL	—	—
145.100.64.0/19	8.2K	25.0%	SURF B.V.	NL	North Holland	Amsterdam
145.102.32.0/19	8.2K	0.5%	SURF B.V.	NL	South Holland	Leiden
145.102.160.0/19	8.2K	0.4%	SURF B.V.	NL	North Holland	Beverwijk
145.107.32.0/19	8.2K	25.2%	SURF B.V.	NL	Limburg	Horst aan de Maas Municipality
145.116.224.0/19	8.2K	0.0%	SURF B.V.	NL	Overijssel	Borne
145.145.128.0/19	8.2K	0.0%	SURF B.V.	NL	—	—
145.146.32.0/19	8.2K	0.0%	SURF B.V.	NL	—	—
194.171.64.0/19	8.2K	32.0%	SURF B.V.	NL	South Holland	Leiden
145.97.48.0/20	4.1K	94.2%	SURF B.V.	NL	Overijssel	Vroomshoop
145.98.16.0/20	4.1K	93.7%	SURF B.V.	NL	—	—
145.100.96.0/20	4.1K	16.9%	SURF B.V.	NL	North Holland	Amsterdam
145.102.16.0/20	4.1K	51.1%	SURF B.V.	NL	—	—
145.102.144.0/20	4.1K	100.0%	SURF B.V.	NL	North Brabant	Eindhoven
145.107.16.0/20	4.1K	0.0%	SURF B.V.	NL	—	—
145.116.192.0/20	4.1K	11.6%	SURF B.V.	NL	—	—
145.145.176.0/20	4.1K	0.0%	SURF B.V.	NL	—	—
145.146.16.0/20	4.1K	0.0%	SURF B.V.	NL	—	—
194.13.16.0/20	4.1K	0.0%	SURF B.V.	NL	—	—

Prefixos BGP Anunciados

Anomalias BGP ao vivo →

Prefixos AS1103 realmente se origina no BGP, observado em nossos coletores RIPE RIS. Esta visualização de roteamento ao vivo pode diferir da alocação de registro acima.

Prefix	Amostras de anúncio	Última vez visto
145.81.0.0/16	31,105	2026-07-24 20:06:14
145.97.16.0/22	26,132	2026-07-24 20:06:14
145.20.0.0/16	25,421	2026-07-24 20:06:14
136.231.0.0/16	23,819	2026-07-24 20:06:07
145.33.0.0/16	23,699	2026-07-24 20:06:27
145.37.0.0/16	23,510	2026-07-24 20:06:27
145.100.0.0/15	22,837	2026-07-24 20:06:27
145.102.0.0/16	22,799	2026-07-24 20:06:27
145.38.0.0/15	22,466	2026-07-24 20:06:27
131.224.0.0/16	22,418	2026-07-24 20:06:28
145.118.0.0/16	22,030	2026-07-24 20:06:27
145.98.0.0/16	21,953	2026-07-24 20:06:27
132.229.0.0/16	21,773	2026-07-24 20:06:07
192.42.124.0/22	21,766	2026-07-24 20:06:07
145.97.0.0/20	21,688	2026-07-24 20:06:14
137.224.0.0/16	21,673	2026-07-24 20:06:07
145.116.64.0/18	21,651	2026-07-24 20:06:14
145.97.20.0/22	21,651	2026-07-24 20:06:14
145.97.24.0/21	21,648	2026-07-24 20:06:14
145.96.0.0/16	21,624	2026-07-24 20:06:27
145.107.0.0/16	21,623	2026-07-24 20:06:27
131.174.0.0/16	21,473	2026-07-24 20:06:27
145.44.0.0/16	21,456	2026-07-24 20:06:14
145.48.0.0/15	21,331	2026-07-24 20:06:27
145.107.24.0/22	21,137	2026-07-24 20:06:14
145.103.0.0/16	21,132	2026-07-24 20:06:27
145.97.48.0/20	21,123	2026-07-24 20:06:14
145.41.0.0/16	20,721	2026-07-24 20:06:14
130.37.0.0/16	20,525	2026-07-24 20:06:28
145.108.0.0/16	20,353	2026-07-24 20:06:28
145.98.16.0/24	20,281	2026-07-24 20:06:14
192.31.231.0/24	20,094	2026-07-24 20:06:28
194.104.124.0/23	20,066	2026-07-24 20:06:28
145.51.0.0/16	20,029	2026-07-24 20:06:28
194.104.240.0/20	19,989	2026-07-24 20:06:28
193.176.235.0/24	19,970	2026-07-24 20:06:07
194.26.12.0/22	19,955	2026-07-24 20:06:28
145.24.0.0/16	19,900	2026-07-24 20:06:28
145.91.0.0/16	19,873	2026-07-24 20:06:28
193.177.176.0/22	19,864	2026-07-24 20:06:28
141.252.0.0/16	19,779	2026-07-24 20:06:28
194.13.16.0/20	19,705	2026-07-24 20:06:07
145.124.0.0/15	19,697	2026-07-24 20:06:27
145.9.0.0/16	19,035	2026-07-24 20:06:14
195.169.0.0/16	18,750	2026-07-24 20:06:28
145.126.0.0/16	18,561	2026-07-24 20:06:27
194.171.0.0/16	18,120	2026-07-24 20:06:28
145.137.128.0/18	18,031	2026-07-24 20:06:14
145.120.0.0/14	17,728	2026-07-24 20:06:27
145.140.0.0/14	17,537	2026-07-24 20:06:27

Mostrando os principais 50 of 100 prefixos anunciados por volume de amostras.

Frequently Asked Questions

O que é AS1103?

AS1103 é um Autonomous System Number atribuído a SURF B.V.. Um ASN identifica uma rede que controla um conjunto específico de endereços IP e determina como o tráfego é roteado pela internet via BGP (Border Gateway Protocol).

Quantos endereços IP o AS1103 anuncia?

AS1103 anuncia 7.20M endereços IPv4 distribuídos por 120 prefixos CIDR roteados. A rede está registrada em The Netherlands.

Quem opera o AS1103?

AS1103 é operado por SURF B.V.. A organização está sediada em The Netherlands. Você pode ver todos os intervalos de IP e ASNs relacionados na página da organização.

Em que país o AS1103 está registrado?

AS1103 está registrado em The Netherlands. Isso indica onde o operador de rede está sediado, embora os endereços IP que ele anuncia possam atender usuários globalmente.

Última atualização: 2026-07-24 20:10:31 UTC