Les adresses IP débutant par 3.99.91 sont fournies par Level 3 Communications, Inc., elles appartiennent au CIDR (Classless Inter-Domain Routing) 4.0.0.0/8, le bloc IP comprant les adresses de 4.0.0.0 à 4.255.255.255). Le numéro de système autonome (ASN) est 3356.
| ASN | 3356 |
| IP commençant par | 4.0.0.0 |
| IP se terminant par | 4.255.255.255 |
| Nom ASN | Level 3 Communications, Inc. |
| CDIR | 4.0.0.0/8 |
| IP numérique | |
| Registe | arin |
| Dernière mise à jour | 18/09/2017 |

| Code pays | Pays | Région | Ville | Latitude | Longitude | Dernière mise à jour | |
| IP2Location | US | États-Unis | - | Fairfield | 41,2184 | -73,2517 | 2017-07-03 |
| MaxMind | US | États-Unis | - | Fairfield | 41,1412 | -73,2637 | 2017-07-03 |
| Whois | US | - | - | - | -96 | 37 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 3.99.91.0 | 56843008 | 0 |
| 3.99.91.1 | 56843009 | 0 |
| 3.99.91.2 | 56843010 | 0 |
| 3.99.91.3 | 56843011 | 0 |
| 3.99.91.4 | 56843012 | 0 |
| 3.99.91.5 | 56843013 | 0 |
| 3.99.91.6 | 56843014 | 0 |
| 3.99.91.7 | 56843015 | 0 |
| 3.99.91.8 | 56843016 | 0 |
| 3.99.91.9 | 56843017 | 0 |
| 3.99.91.10 | 56843018 | 0 |
| 3.99.91.11 | 56843019 | 0 |
| 3.99.91.12 | 56843020 | 0 |
| 3.99.91.13 | 56843021 | 0 |
| 3.99.91.14 | 56843022 | 0 |
| 3.99.91.15 | 56843023 | 0 |
| 3.99.91.16 | 56843024 | 0 |
| 3.99.91.17 | 56843025 | 0 |
| 3.99.91.18 | 56843026 | 0 |
| 3.99.91.19 | 56843027 | 0 |
| 3.99.91.20 | 56843028 | 0 |
| 3.99.91.21 | 56843029 | 0 |
| 3.99.91.22 | 56843030 | 0 |
| 3.99.91.23 | 56843031 | 0 |
| 3.99.91.24 | 56843032 | 0 |
| 3.99.91.25 | 56843033 | 0 |
| 3.99.91.26 | 56843034 | 0 |
| 3.99.91.27 | 56843035 | 0 |
| 3.99.91.28 | 56843036 | 0 |
| 3.99.91.29 | 56843037 | 0 |
| 3.99.91.30 | 56843038 | 0 |
| 3.99.91.31 | 56843039 | 0 |
| 3.99.91.32 | 56843040 | 0 |
| 3.99.91.33 | 56843041 | 0 |
| 3.99.91.34 | 56843042 | 0 |
| 3.99.91.35 | 56843043 | 0 |
| 3.99.91.36 | 56843044 | 0 |
| 3.99.91.37 | 56843045 | 0 |
| 3.99.91.38 | 56843046 | 0 |
| 3.99.91.39 | 56843047 | 0 |
| 3.99.91.40 | 56843048 | 0 |
| 3.99.91.41 | 56843049 | 0 |
| 3.99.91.42 | 56843050 | 0 |
| 3.99.91.43 | 56843051 | 0 |
| 3.99.91.44 | 56843052 | 0 |
| 3.99.91.45 | 56843053 | 0 |
| 3.99.91.46 | 56843054 | 0 |
| 3.99.91.47 | 56843055 | 0 |
| 3.99.91.48 | 56843056 | 0 |
| 3.99.91.49 | 56843057 | 0 |
| 3.99.91.50 | 56843058 | 0 |
| 3.99.91.51 | 56843059 | 0 |
| 3.99.91.52 | 56843060 | 0 |
| 3.99.91.53 | 56843061 | 0 |
| 3.99.91.54 | 56843062 | 0 |
| 3.99.91.55 | 56843063 | 0 |
| 3.99.91.56 | 56843064 | 0 |
| 3.99.91.57 | 56843065 | 0 |
| 3.99.91.58 | 56843066 | 0 |
| 3.99.91.59 | 56843067 | 0 |
| 3.99.91.60 | 56843068 | 0 |
| 3.99.91.61 | 56843069 | 0 |
| 3.99.91.62 | 56843070 | 0 |
| 3.99.91.63 | 56843071 | 0 |
| 3.99.91.64 | 56843072 | 0 |
| 3.99.91.65 | 56843073 | 0 |
| 3.99.91.66 | 56843074 | 0 |
| 3.99.91.67 | 56843075 | 0 |
| 3.99.91.68 | 56843076 | 0 |
| 3.99.91.69 | 56843077 | 0 |
| 3.99.91.70 | 56843078 | 0 |
| 3.99.91.71 | 56843079 | 0 |
| 3.99.91.72 | 56843080 | 0 |
| 3.99.91.73 | 56843081 | 0 |
| 3.99.91.74 | 56843082 | 0 |
| 3.99.91.75 | 56843083 | 0 |
| 3.99.91.76 | 56843084 | 0 |
| 3.99.91.77 | 56843085 | 0 |
| 3.99.91.78 | 56843086 | 0 |
| 3.99.91.79 | 56843087 | 0 |
| 3.99.91.80 | 56843088 | 0 |
| 3.99.91.81 | 56843089 | 0 |
| 3.99.91.82 | 56843090 | 0 |
| 3.99.91.83 | 56843091 | 0 |
| 3.99.91.84 | 56843092 | 0 |
| 3.99.91.85 | 56843093 | 0 |