subnet.im

AS28573Claro NXT Telecomunicacoes Ltda

BrazilRegistryLACNICTypeEyeball

As of 10th November 2026, AS28573 (Claro NXT Telecomunicacoes Ltda), an access network registered in Brazil with LACNIC, originates 5,102 IPv4 prefixes covering 14.6M addresses and 2,245 IPv6 prefixes. By IPv4 address space that makes it the 50th-largest of the 80,723 networks we see originating IPv4, and the 2nd-largest of 8,031 in Brazil. It is seen behind 13 upstream networks, most often AS4230 (Claro (Embratel)) and AS35280 (F5 Networks SARL), and in front of 1 downstream network. Over 99% of its announcements have a valid RPKI ROA; 12 are RPKI-invalid. 41% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

5,102

IPv6 prefixes

2,245

IPv4 addresses

14.6M

IPv6 /64s

2.5B

Upstream graph

The networks AS28573 is seen behind, one and two hops out, drawn from real AS paths.

AS28573Toward the internet core
Upstream graph for AS28573: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS28573Claro NXT Telecom…This networkAS4230Claro (Embratel)AS6939Hurricane Electri…AS14537Continent 8 LLCAS35280F5 Networks SARLAS137409GSL Networks Pty …AS20130Depaul UniversityAS132337AxclusiveAS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS3356Lumen (Level 3)AS32590Valve CorporationAS8529Zain Omantel Inte…

Networks observed one and two hops upstream of AS28573 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

65

adjacent networks

Upstreams
1320%
Peers
5178%
Downstreams
12%

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

Upstreams of AS28573
NetworkCountryRelationshipPathsVantage pts
AS4230Claro (Embratel)BRPeer218,044139
AS35280F5 Networks SARLFRPeer7044
AS14537Continent 8 LLCUSPeer5434
AS137409GSL Networks Pty LTDAUPeer4883
AS6939Hurricane Electric LLCUSPeer42912
AS1000LINK AMERICANUSPeer3922
AS266213PLANETCLICK TELECOMUNICACOES LTDABRPeer3192
AS262355VSX NetworksBRPeer2922
AS7195EdgeUnoCOPeer2763
AS16735Algar TelecomBRPeer1151

Prefixes

All 7,347

The largest blocks AS28573 originates, widest first.

Largest prefixes originated by AS28573
PrefixAddressesVisibility
179.136.0.0/14262k76/76
179.140.0.0/15131k75/76
179.142.0.0/15131k75/76
177.32.0.0/1665.5k76/76
177.33.0.0/1665.5k76/76
177.80.0.0/1665.5k76/76
177.81.0.0/1665.5k76/76
177.140.0.0/1665.5k76/76
177.141.0.0/1665.5k76/76
177.142.0.0/1665.5k76/76

Routing health

How AS28573'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

  • Valid99.8%7,334
  • Invalid0.2%12
  • No ROA<0.1%1

Propagation

  • Globally propagated90% of full-feed peers or more41.4%3,043
  • Partially propagated40% to 90%<0.1%2
  • Seen by few peersUnder 40%58.6%4,302

Prefix sizes

IPv4 — 5,102 prefixes

IPv6 — 2,245 prefixes

  • /4016.8M × /645.7%128
  • /424.2M × /640.4%8
  • /441M × /645.1%114
  • /45524k × /644.9%109
  • /4865.5k × /6471.0%1,595
  • /49 and longerAggregated13.0%291

Recent changes

Announcements that started or stopped since 11th Oct 2026.

560 announced and 592 withdrawn in all; the most recent are shown.

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