subnet.im

AS27747Telecentro S.A.

ArgentinaRegistryLACNICTypeEyeball

As of 23rd October 2026, AS27747 (Telecentro S.A.), an access network registered in Argentina with LACNIC, originates 1,646 IPv4 prefixes covering 2.3M addresses and 755 IPv6 prefixes. By IPv4 address space that makes it the 247th-largest of the 79,666 networks we see originating IPv4, and the 3rd-largest of 1,068 in Argentina. It is seen behind 6 upstream networks, most often AS3356 (Lumen (Level 3)) and AS6762 (Telecom Italia Sparkle (Seabone)), and in front of 4 downstream networks. Over 99% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 10% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

1,646

IPv6 prefixes

755

IPv4 addresses

2.3M

IPv6 /64s

146B

Upstream graph

The networks AS27747 is seen behind, one and two hops out, drawn from real AS paths.

AS27747Toward the internet core
Upstream graph for AS27747: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS27747Telecentro S.A.This networkAS174Cogent Communicat…AS3356Lumen (Level 3)AS6762Telecom Italia Sp…AS6939Hurricane Electri…AS7195EdgeUnoAS3549Lumen (fka. Globa…AS2914NTT America, Inc.AS1299Arelion (fka. Tel…AS52075Wifirst S.A.S.AS20130Depaul UniversityAS132337AxclusiveAS32590Valve Corporation

Networks observed one and two hops upstream of AS27747 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

25

adjacent networks

Upstreams
624%
Peers
1560%
Downstreams
416%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS27747
NetworkCountryRelationshipPathsVantage pts
AS3356Lumen (Level 3)USPeer6,691125
AS6762Telecom Italia Sparkle (Seabone)ITPeer4,70694
AS7195EdgeUnoCOPeer4,5764
AS6939Hurricane Electric LLCUSPeer3,97725
AS174Cogent Communications, LLCUSPeer3,359134
AS22927Telefonica de ArgentinaARPeer2,424138

Prefixes

All 2,401

The largest blocks AS27747 originates, widest first.

Largest prefixes originated by AS27747
PrefixAddressesVisibility
181.44.0.0/15131k76/77
181.46.0.0/15131k76/77
186.22.0.0/15131k76/77
186.18.0.0/1665.5k76/77
186.19.0.0/1665.5k76/77
190.55.0.0/1816.4k76/77
190.55.64.0/1816.4k76/77
190.55.128.0/1816.4k76/77
190.55.192.0/1816.4k76/77
200.125.64.0/198.2k76/77

Routing health

How AS27747's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid99.9%2,399
  • Invalid0.0%0
  • No ROA<0.1%2

Propagation

  • Globally propagated90% of full-feed peers or more9.5%229
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%90.5%2,172

Prefix sizes

IPv4 — 1,646 prefixes

IPv6 — 755 prefixes

  • /2868.7B × /640.1%1
  • /318.6B × /640.1%1
  • /324.3B × /642.1%16
  • /4016.8M × /640.1%1
  • /418.4M × /640.4%3
  • /424.2M × /640.5%4
  • /4865.5k × /6496.6%729

Recent changes

Announcements that started or stopped since 23rd Sept 2026.

114 announced and 147 withdrawn in all; the most recent are shown.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.