Les adresses IP débutant par 2.81.20 sont fournies par , elles appartiennent au CIDR (Classless Inter-Domain Routing) 2.80.0.0/14, le bloc IP comprant les adresses de 2.80.0.0 à 2.83.255.255). Le numéro de système autonome (ASN) est 3243.
| ASN | 3243 |
| IP commençant par | 2.80.0.0 |
| IP se terminant par | 2.83.255.255 |
| Nom ASN | |
| CDIR | 2.80.0.0/14 |
| IP numérique | |
| Registe | ripencc |
| Dernière mise à jour | 25/07/2017 |

| Code pays | Pays | Région | Ville | Latitude | Longitude | Dernière mise à jour | |
| IP2Location | PT | Portugal | - | Coimbra | 40,2056 | -8,4196 | 2017-07-25 |
| MaxMind | PT | Portugal | - | Viseu | 40,661 | -7,9097 | 2017-07-25 |
| Whois | PT | - | - | - | -8 | 39 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 2.81.20.0 | 38867968 | 0 |
| 2.81.20.1 | 38867969 | 0 |
| 2.81.20.2 | 38867970 | 0 |
| 2.81.20.3 | 38867971 | 0 |
| 2.81.20.4 | 38867972 | 0 |
| 2.81.20.5 | 38867973 | 0 |
| 2.81.20.6 | 38867974 | 0 |
| 2.81.20.7 | 38867975 | 0 |
| 2.81.20.8 | 38867976 | 0 |
| 2.81.20.9 | 38867977 | 0 |
| 2.81.20.10 | 38867978 | 0 |
| 2.81.20.11 | 38867979 | 0 |
| 2.81.20.12 | 38867980 | 0 |
| 2.81.20.13 | 38867981 | 0 |
| 2.81.20.14 | 38867982 | 0 |
| 2.81.20.15 | 38867983 | 0 |
| 2.81.20.16 | 38867984 | 0 |
| 2.81.20.17 | 38867985 | 0 |
| 2.81.20.18 | 38867986 | 0 |
| 2.81.20.19 | 38867987 | 0 |
| 2.81.20.20 | 38867988 | 0 |
| 2.81.20.21 | 38867989 | 0 |
| 2.81.20.22 | 38867990 | 0 |
| 2.81.20.23 | 38867991 | 0 |
| 2.81.20.24 | 38867992 | 0 |
| 2.81.20.25 | 38867993 | 0 |
| 2.81.20.26 | 38867994 | 0 |
| 2.81.20.27 | 38867995 | 0 |
| 2.81.20.28 | 38867996 | 0 |
| 2.81.20.29 | 38867997 | 0 |
| 2.81.20.30 | 38867998 | 0 |
| 2.81.20.31 | 38867999 | 0 |
| 2.81.20.32 | 38868000 | 0 |
| 2.81.20.33 | 38868001 | 0 |
| 2.81.20.34 | 38868002 | 0 |
| 2.81.20.35 | 38868003 | 0 |
| 2.81.20.36 | 38868004 | 0 |
| 2.81.20.37 | 38868005 | 0 |
| 2.81.20.38 | 38868006 | 0 |
| 2.81.20.39 | 38868007 | 0 |
| 2.81.20.40 | 38868008 | 0 |
| 2.81.20.41 | 38868009 | 0 |
| 2.81.20.42 | 38868010 | 0 |
| 2.81.20.43 | 38868011 | 0 |
| 2.81.20.44 | 38868012 | 0 |
| 2.81.20.45 | 38868013 | 0 |
| 2.81.20.46 | 38868014 | 0 |
| 2.81.20.47 | 38868015 | 0 |
| 2.81.20.48 | 38868016 | 0 |
| 2.81.20.49 | 38868017 | 0 |
| 2.81.20.50 | 38868018 | 0 |
| 2.81.20.51 | 38868019 | 0 |
| 2.81.20.52 | 38868020 | 0 |
| 2.81.20.53 | 38868021 | 0 |
| 2.81.20.54 | 38868022 | 0 |
| 2.81.20.55 | 38868023 | 0 |
| 2.81.20.56 | 38868024 | 0 |
| 2.81.20.57 | 38868025 | 0 |
| 2.81.20.58 | 38868026 | 0 |
| 2.81.20.59 | 38868027 | 0 |
| 2.81.20.60 | 38868028 | 0 |
| 2.81.20.61 | 38868029 | 0 |
| 2.81.20.62 | 38868030 | 0 |
| 2.81.20.63 | 38868031 | 0 |
| 2.81.20.64 | 38868032 | 0 |
| 2.81.20.65 | 38868033 | 0 |
| 2.81.20.66 | 38868034 | 0 |
| 2.81.20.67 | 38868035 | 0 |
| 2.81.20.68 | 38868036 | 0 |
| 2.81.20.69 | 38868037 | 0 |
| 2.81.20.70 | 38868038 | 0 |
| 2.81.20.71 | 38868039 | 0 |
| 2.81.20.72 | 38868040 | 0 |
| 2.81.20.73 | 38868041 | 0 |
| 2.81.20.74 | 38868042 | 0 |
| 2.81.20.75 | 38868043 | 0 |
| 2.81.20.76 | 38868044 | 0 |
| 2.81.20.77 | 38868045 | 0 |
| 2.81.20.78 | 38868046 | 0 |
| 2.81.20.79 | 38868047 | 0 |
| 2.81.20.80 | 38868048 | 0 |
| 2.81.20.81 | 38868049 | 0 |
| 2.81.20.82 | 38868050 | 0 |
| 2.81.20.83 | 38868051 | 0 |
| 2.81.20.84 | 38868052 | 0 |
| 2.81.20.85 | 38868053 | 0 |