AS8489 — PORTAL-TO-WEB Martin Mersberger EDV Beratung

AS8489 announces 5 IPv4 prefixes covering 1,536 addresses and 2 IPv6 prefixes.

About this network

PORTAL-TO-WEB belongs to EDV Beratung Mersberger, a small German IT consultancy in Türkheim, Bavaria, trading under the portal-to-web.de name. It is essentially a one-office operation that happens to run its own BGP network.

What it's used for

• Hosting and connectivity for the consultancy's own services and for a small number of German customers.
• Routing provider-independent address space on behalf of those customers, so they keep their addresses independently of any single upstream.

Notable

• About 1,500 IPv4 addresses across five prefixes plus two IPv6 /48s, behind a single upstream. Only a couple of dozen domains resolve into the space.
• Some prefixes are RIPE PI blocks registered to other German parties (netnames such as WEILHAMMER-NET and ECKEL-NET-1) rather than to Mersberger. This is the normal shape of a small provider announcing customer PI space, not an address-broker: every block is German, RIPE-registered, held by a settled registrant, and assigned in 2003–2007. Even so, do not attribute those prefixes' owners to the AS holder.

Interesting

• The AS is a good example of how low numbers survive in odd corners: a four-digit AS carrying less address space than a single home ISP allocation, run by a consultancy rather than a carrier.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 91.198.114.0/24
• 91.199.88.0/24
• 193.37.151.0/24
• 195.22.142.0/23
• 195.245.254.0/24
• 2001:678:1000::/48
• 2001:678:10c4::/48

Upstream networks

• AS34872 Sarah Rossius trading as Servperso Systems
• AS35661 VIRTUA SYSTEMS SAS
• AS35708 4b42 UG
• AS401753 BIXCE Inc
• AS56662 Marcin Gondek
• AS199854 Jens Thies

Adjacent networks

• AS34872 Sarah Rossius trading as Servperso Systems
• AS35661 VIRTUA SYSTEMS SAS
• AS35708 4b42 UG
• AS401753 BIXCE Inc
• AS56662 Marcin Gondek
• AS199854 Jens Thies

Routing security

• RPKI: 0 valid, 0 invalid and 7 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 8 route objects.
• Listed in as-sets: AS-4IXP, AS-4IXP-RS, AS-4IXPV4, AS-ECRCCUSTDE, AS-HURRICANEV6, AS-P2W, AS-RETN-ACTUAL-V4, AS-RETN-ACTUAL-V6, AS3214:AS-FILTERED, AS3214:AS-FILTERED, AS3214:AS-FILTERED, AS34872:AS-DOWNSTREAM-DE, AS34872:AS-DOWNSTREAM-DE, AS35661:AS-FRA01DE.

Internet exchanges

• 4b42 Internet Exchange Point — Zurich, Switzerland
• Local Internet Exchange Düsseldorf — Düsseldorf, Germany