Autonomous system
AS27720 CITTA TELECOM LTDA
Unclassified APNIC NSP
Summary
Citta Telecom
residential isp brazil cgnat
AS27720 is operated by Citta Telecom Ltda.
What it's used for
- The address space carries residential and mobile access traffic, evidenced by reverse DNS entries such as
cgnat-bre.cittatelecom.net.brandreservado-sp.cittatelecom.net.br. - The AS announces 6144 IPv4 addresses across 8 prefixes and 55 IPv6 prefixes, while maintaining 28 observed neighbours. This ratio of address space to peering partners indicates an access or eyeball network rather than a transit provider.
Notable
- Most prefixes are registered to
CITTA TELECOM LTDA, though the prefix191.128.224.0/22is registered toTIM S/A, suggesting a lease or historical acquisition. - The inventory consists of multiple /22 blocks and smaller subdivisions, with reverse DNS indicating specific regional segments like
reservado-rjandreservado-sp.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
Recorded at 2 exchanges in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| IX.br (PTT.br) São Paulo | São Paulo, Brazil | 187.16.220.164 |
| IX.br (PTT.br) Porto Alegre | Porto Alegre, Brazil | 177.52.38.224 |
Transit providers
7 upstream, 2 downstream and 16 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 8 prefixes · 6.14K addresses IPv6 54 prefixes
| Country | Name | Prefixes |
|---|---|---|
| BR | Brazil | 62 |
Registry
Allocation record
- Registry
- APNIC
- Handle
27720- Registry name
- ASN27720
- Registrant
- CITTA TELECOM LTDA
- Abuse contact
- Citta Telecom
- Registered
- 2013-04-22
- Last changed
- 2013-04-22
- Allocation
- allocated
Declared
PeeringDB profile
- Name
- Citta Telecom
- Network type
- NSP
- Scope
- South America
- Traffic ratio
- Mostly Inbound
- Peering policy
- Open
- IRR as-set
AS-CITTA-ALL- Present at
- 2 exchanges
- Facilities
- 2 facilities
- Website
- http://www.cittatelecom.com.br/
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 93% valid · 51 valid, 4 with no ROA
- ROAs
- 51 authorising AS27720
- ASPA
- 5 declared providers
- IRR
- 93% registered · 51 of 55 announcements 4 other origin
- Route objects
- 20 naming AS27720
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 442 networks and 1,773 prefixes, as published 2026-10-13. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere